fs/ext4/extents.c in the Linux kernel before 3.0 does not mark a modified extent as dirty in certain cases of extent splitting, which allows local users to cause a denial of service (system crash) via vectors involving ext4 umount and mount operations.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-1530 advisory.

    - [kernel] KEYS: Fix a NULL pointer deref in the user-defined key type (David Howells) [751190]     {CVE-2011-4110}
    - [netdrv] benet: remove bogus 'unlikely' on vlan check (Ivan Vecera) [736429] {CVE-2011-3347}
    - [netdrv] be2net: non-member vlan pkts not received in promiscous mode (Ivan Vecera) [736429]     {CVE-2011-3347}
    - [netdrv] be2net: fix crash receiving non-member VLAN packets (Ivan Vecera) [736429] {CVE-2011-3347}
    - [fs] GFS2: rewrite fallocate code to write blocks directly (Benjamin Marzinski) [750208] {CVE-2011-4098}
    - [net] vlan: fix panic when handling priority tagged frames (Andy Gospodarek) [714936] {CVE-2011-3593}
    - [mm] oom: fix integer overflow of points in oom_badness (Frantisek Hrbata) [741207] {CVE-2011-4097}
    - [fs] ext4: fix BUG_ON() in ext4_ext_insert_extent() (Lukas Czerner) [742091] {CVE-2011-3638}
    - [fs] proc: fix oops on invalid /proc/pid/maps access (Johannes Weiner) [746613] {CVE-2011-3637}
    - [kernel] fix taskstats io infoleak (Jerome Marchand) [716848] {CVE-2011-2494}
    - [net] bridge: fix use after free in __br_deliver() (Amerigo Wang) [730756] {CVE-2011-2942}
    - [fs] cifs: add fallback in is_path_accessible for old servers (Jeff Layton) [692709] {CVE-2011-3363}
    - [tpm] Zero buffer after copying to userspace (Jiri Benc) [732633] {CVE-2011-1161 CVE-2011-1162}
    - [fs] make sessionid permissions in /proc/*/task/* match those in /proc/* (Johannes Weiner) [692039]     {CVE-2011-1020}
    - [netdrv] b43: allocate receive buffers big enough for max frame len + offset (RuiRui Yang) [738205]     {CVE-2011-3359}
    - [fs] fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message (RuiRui Yang) [736765] {CVE-2011-3353}
    - [fs] cifs: fix possible memory corruption in CIFSFindNext (Jeff Layton) [730354] {CVE-2011-3191}
    - [kernel] perf tools: do not look at ./config for configuration (Jiri Benc) [730204] {CVE-2011-2905}
    - [fs] corrupted GUID partition tables can cause kernel oops (Jerome Marchand) [695982] {CVE-2011-1577}
    - [x86] perf: Fix Intel fixed counters base initialization (Don Zickus) [736284] {CVE-2011-2521}
    - [net] Compute protocol sequence numbers and fragment IDs using MD5. (Jiri Pirko) [732665]     {CVE-2011-3188}
    - [crypto] Move md5_transform to lib/md5.c (Jiri Pirko) [732665] {CVE-2011-3188}
    - [net] ipv6: make fragment identifications less predictable (Jiri Pirko) [723433] {CVE-2011-2699}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote NewStart CGSL host, running version MAIN 4.05, has httpd packages installed that are affected by multiple vulnerabilities:

  - Off-by-one error in the mod_ssl Certificate Revocation     List (CRL) verification callback in Apache, when     configured to use a CRL, allows remote attackers to     cause a denial of service (child process crash) via a     CRL that causes a buffer overflow of one null byte.
    (CVE-2005-1268)

  - The Apache HTTP server before 1.3.34, and 2.0.x before     2.0.55, when acting as an HTTP proxy, allows remote     attackers to poison the web cache, bypass web     application firewall protection, and conduct XSS attacks     via an HTTP request with both a Transfer-Encoding:
    chunked header and a Content-Length header, which     causes Apache to incorrectly handle and forward the body     of the request in a way that causes the receiving server     to process it as a separate HTTP request, aka HTTP     Request Smuggling. (CVE-2005-2088)

  - ssl_engine_kernel.c in mod_ssl before 2.8.24, when using     SSLVerifyClient optional in the global virtual host     configuration, does not properly enforce     SSLVerifyClient require in a per-location context,     which allows remote attackers to bypass intended access     restrictions. (CVE-2005-2700)

  - The byte-range filter in Apache 2.0 before 2.0.54 allows     remote attackers to cause a denial of service (memory     consumption) via an HTTP header with a large Range     field. (CVE-2005-2728)

  - Cross-site scripting (XSS) vulnerability in the mod_imap     module of Apache httpd before 1.3.35-dev and Apache     httpd 2.0.x before 2.0.56-dev allows remote attackers to     inject arbitrary web script or HTML via the Referer when     using image maps. (CVE-2005-3352)

  - mod_ssl in Apache 2.0 up to 2.0.55, when configured with     an SSL vhost with access control and a custom error 400     error page, allows remote attackers to cause a denial of     service (application crash) via a non-SSL request to an     SSL port, which triggers a NULL pointer dereference.
    (CVE-2005-3357)

  - The TLS protocol, and the SSL protocol 3.0 and possibly     earlier, as used in Microsoft Internet Information     Services (IIS) 7.0, mod_ssl in the Apache HTTP Server     2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5     and earlier, Mozilla Network Security Services (NSS)     3.12.4 and earlier, multiple Cisco products, and other     products, does not properly associate renegotiation     handshakes with an existing connection, which allows     man-in-the-middle attackers to insert data into HTTPS     sessions, and possibly other types of sessions protected     by TLS or SSL, by sending an unauthenticated request     that is processed retroactively by a server in a post-     renegotiation context, related to a plaintext     injection attack, aka the Project Mogul issue.
    (CVE-2009-3555)

  - The (1) mod_cache and (2) mod_dav modules in the Apache     HTTP Server 2.2.x before 2.2.16 allow remote attackers     to cause a denial of service (process crash) via a     request that lacks a path. (CVE-2010-1452)

  - fs/ext4/extents.c in the Linux kernel before 3.0 does     not mark a modified extent as dirty in certain cases of     extent splitting, which allows local users to cause a     denial of service (system crash) via vectors involving     ext4 umount and mount operations. (CVE-2011-3638)

  - It was discovered that the HTTP parser in httpd     incorrectly allowed certain characters not permitted by     the HTTP protocol specification to appear unencoded in     HTTP request headers. If httpd was used in conjunction     with a proxy or backend server that interpreted those     characters differently, a remote attacker could possibly     use this flaw to inject data into HTTP responses,     resulting in proxy cache poisoning. (CVE-2016-8743)

  - It was discovered that the use of httpd's     ap_get_basic_auth_pw() API function outside of the     authentication phase could lead to authentication     bypass. A remote attacker could possibly use this flaw     to bypass required authentication if the API was used     incorrectly by one of the modules used by httpd.
    (CVE-2017-3167)

  - A NULL pointer dereference flaw was found in the httpd's     mod_ssl module. A remote attacker could use this flaw to     cause an httpd child process to crash if another module     used by httpd called a certain API function during the     processing of an HTTPS request. (CVE-2017-3169)

  - A buffer over-read flaw was found in the httpd's     ap_find_token() function. A remote attacker could use     this flaw to cause httpd child process to crash via a     specially crafted HTTP request. (CVE-2017-7668)

  - A buffer over-read flaw was found in the httpd's     mod_mime module. A user permitted to modify httpd's MIME     configuration could use this flaw to cause httpd child     process to crash. (CVE-2017-7679)

  - It was discovered that the httpd's mod_auth_digest     module did not properly initialize memory before using     it when processing certain headers related to digest     authentication. A remote attacker could possibly use     this flaw to disclose potentially sensitive information     or cause httpd child process to crash by sending     specially crafted requests to a server. (CVE-2017-9788)

  - A use-after-free flaw was found in the way httpd handled     invalid and previously unregistered HTTP methods     specified in the Limit directive used in an .htaccess     file. A remote attacker could possibly use this flaw to     disclose portions of the server memory, or cause httpd     child process to crash. (CVE-2017-9798)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2013-0039 for details.

An updated rhev-hypervisor5 package that fixes several security issues and various bugs is now available.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions.

A heap overflow flaw was found in the way QEMU-KVM emulated the e1000 network interface card. A privileged guest user in a virtual machine whose network interface is configured to use the e1000 emulated driver could use this flaw to crash the host or, possibly, escalate their privileges on the host. (CVE-2012-0029)

A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query() function. An attacker able to send certain IGMP (Internet Group Management Protocol) packets to a target system could use this flaw to cause a denial of service. (CVE-2012-0207)

A double free flaw was discovered in the policy checking code in OpenSSL. A remote attacker could use this flaw to crash an application that uses OpenSSL by providing an X.509 certificate that has specially crafted policy extension data. (CVE-2011-4109)

An information leak flaw was found in the SSL 3.0 protocol implementation in OpenSSL. Incorrect initialization of SSL record padding bytes could cause an SSL client or server to send a limited amount of possibly sensitive data to its SSL peer via the encrypted connection. (CVE-2011-4576)

It was discovered that OpenSSL did not limit the number of TLS/SSL handshake restarts required to support Server Gated Cryptography. A remote attacker could use this flaw to make a TLS/SSL server using OpenSSL consume an excessive amount of CPU by continuously restarting the handshake. (CVE-2011-4619)

Red Hat would like to thank Nicolae Mogoreanu for reporting CVE-2012-0029, and Simon McVittie for reporting CVE-2012-0207.

This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers :

CVE-2006-1168 and CVE-2011-2716 (busybox issues)

CVE-2009-5029, CVE-2009-5064, CVE-2010-0830 and CVE-2011-1089 (glibc issues)

CVE-2011-1083, CVE-2011-3638, CVE-2011-4086, CVE-2011-4127 and CVE-2012-0028 (kernel issues)

CVE-2011-1526 (krb5 issue)

CVE-2011-4347 (kvm issue)

CVE-2010-4008, CVE-2011-0216, CVE-2011-2834, CVE-2011-3905, CVE-2011-3919 and CVE-2011-1944 (libxml2 issues)

CVE-2011-1749 (nfs-utils issue)

CVE-2011-4108 (openssl issue)

CVE-2011-0010 (sudo issue)

CVE-2011-1675 and CVE-2011-1677 (util-linux issues)

CVE-2010-0424 (vixie-cron issue)

This updated rhev-hypervisor5 package fixes various bugs.
Documentation of these changes will be available shortly in the Technical Notes document :

https://docs.redhat.com/docs/en-US/ Red_Hat_Enterprise_Virtualization_for_Servers/2.2/html/Technical_Notes / index.html

Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.

The openSUSE 11.4 kernel was updated to fix various bugs and security issues.

This is the final update of the 2.6.37 kernel of openSUSE 11.4.

This kernel update of the openSUSE 12.1 kernel fixes lots of bugs and security issues.

Following issues were fixed :

  - tcp: drop SYN+FIN messages (bnc#765102).

  - net: sock: validate data_len before allocating skb in     sock_alloc_send_pskb() (bnc#765320, CVE-2012-2136).

  - fcaps: clear the same personality flags as suid when     fcaps are used (bnc#758260 CVE-2012-2123).

  - macvtap: zerocopy: validate vectors before building skb     (bnc#758243 CVE-2012-2119).

  - hfsplus: Fix potential buffer overflows (bnc#760902     CVE-2009-4020).

  - xfrm: take net hdr len into account for esp payload size     calculation (bnc#759545).

  - ext4: fix undefined behavior in ext4_fill_flex_info()     (bnc#757278).

  - igb: fix rtnl race in PM resume path (bnc#748859).

  - ixgbe: add missing rtnl_lock in PM resume path     (bnc#748859).

  - b43: allocate receive buffers big enough for max frame     len + offset (bnc#717749).

  - xenbus: Reject replies with payload >     XENSTORE_PAYLOAD_MAX.

  - xenbus_dev: add missing error checks to watch handling.

  - hwmon: (coretemp-xen) Fix TjMax detection for older     CPUs.

  - hwmon: (coretemp-xen) Relax target temperature range     check.

  - Refresh other Xen patches.

  - tlan: add cast needed for proper 64 bit operation     (bnc#756840).

  - dl2k: Tighten ioctl permissions (bnc#758813).

  - [media] cx22702: Fix signal strength.

  - fs: cachefiles: Add support for large files in     filesystem caching (bnc#747038).

  - bridge: correct IPv6 checksum after pull (bnc#738644).

  - bridge: fix a possible use after free (bnc#738644).

  - bridge: Pseudo-header required for the checksum of     ICMPv6 (bnc#738644).

  - bridge: mcast snooping, fix length check of snooped     MLDv1/2 (bnc#738644).

  - PCI/ACPI: Report ASPM support to BIOS if not disabled     from command line (bnc#714455).

  - ipc/sem.c: fix race with concurrent semtimedop()     timeouts and IPC_RMID (bnc#756203).

  - drm/i915/crt: Remove 0xa0 probe for VGA.

  - tty_audit: fix tty_audit_add_data live lock on audit     disabled (bnc#721366).

  - drm/i915: suspend fbdev device around suspend/hibernate     (bnc#732908).

  - dlm: Do not allocate a fd for peeloff (bnc#729247).

  - sctp: Export sctp_do_peeloff (bnc#729247).

  - i2c-algo-bit: Fix spurious SCL timeouts under heavy     load.

  - patches.fixes/epoll-dont-limit-non-nested.patch: Don't     limit non-nested epoll paths (bnc#676204).

  - Update patches.suse/sd_init.mark_majors_busy.patch     (bnc#744658).

  - igb: Fix for Alt MAC Address feature on 82580 and later     devices (bnc#746980).

  - mark busy sd majors as allocated (bug#744658).

  - regset: Return -EFAULT, not -EIO, on host-side memory     fault (bnc# 750079 CVE-2012-1097).

  - regset: Prevent NULL pointer reference on readonly     regsets (bnc#750079 CVE-2012-1097).

  - mm: memcg: Correct unregistring of events attached to     the same eventfd (CVE-2012-1146 bnc#750959).

  - befs: Validate length of long symbolic links     (CVE-2011-2928 bnc#713430).

  - si4713-i2c: avoid potential buffer overflow on si4713     (CVE-2011-2700 bnc#707332).

  - staging: comedi: fix infoleak to userspace     (CVE-2011-2909 bnc#711941).

  - hfs: add sanity check for file name length     (CVE-2011-4330 bnc#731673).

  - cifs: fix dentry refcount leak when opening a FIFO on     lookup (CVE-2012-1090 bnc#749569).

  - drm: integer overflow in drm_mode_dirtyfb_ioctl()     (CVE-2012-0044 bnc#740745).

  - xfs: fix acl count validation in xfs_acl_from_disk()     (CVE-2012-0038 bnc#740703).

  - xfs: validate acl count (CVE-2012-0038 bnc#740703).

  -     patches.fixes/xfs-fix-possible-memory-corruption-in-xfs_     readlink: Work around missing xfs_alert().

  - xfs: Fix missing xfs_iunlock() on error recovery path in     xfs_readlink() (CVE-2011-4077 bnc#726600).

  - xfs: Fix possible memory corruption in xfs_readlink     (CVE-2011-4077 bnc#726600).

  - ext4: make ext4_split_extent() handle error correctly.

  - ext4: ext4_ext_convert_to_initialized bug found in     extended FSX testing.

  - ext4: add ext4_split_extent_at() and     ext4_split_extent().

  - ext4: reimplement convert and split_unwritten     (CVE-2011-3638 bnc#726045).

  - patches.fixes/epoll-limit-paths.patch: epoll: limit     paths (bnc#676204 CVE-2011-1083).

  - patches.kabi/epoll-kabi-fix.patch: epoll: hide kabi     change in struct file (bnc#676204 CVE-2011-1083).

  - NAT/FTP: Fix broken conntrack (bnc#681639 bnc#466279     bnc#747660).

  - igmp: Avoid zero delay when receiving odd mixture of     IGMP queries (bnc#740448 CVE-2012-0207).

  - jbd2: clear BH_Delay & BH_Unwritten in     journal_unmap_buffer (bnc#745832 CVE-2011-4086).

  - AppArmor: fix oops in apparmor_setprocattr (bnc#717209     CVE-2011-3619).

  - Refresh patches.suse/SoN-22-netvm.patch. Clean and
    *working* patches.

  - Refresh patches.suse/SoN-22-netvm.patch. (bnc#683671)     Fix an rcu locking imbalance in the receive path     triggered when using vlans.

  - Fix mangled patch (invalid date) Although accepted by     `patch`, this is rejected by `git apply`

  - Fix mangled diff lines (leading space tab vs tab)     Although accepted by `patch`, these are rejected by `git     apply`

  - jbd/jbd2: validate sb->s_first in     journal_get_superblock() (bnc#730118).

  - fsnotify: don't BUG in fsnotify_destroy_mark()     (bnc#689860).

  - Fix     patches.fixes/x25-Handle-undersized-fragmented-skbs.patc     h (CVE-2010-3873 bnc#651219).

  - Fix     patches.fixes/x25-Prevent-skb-overreads-when-checking-ca     ll-user-da.patch (CVE-2010-3873 bnc#651219).

  - Fix     patches.fixes/x25-Validate-incoming-call-user-data-lengt     hs.patch (CVE-2010-3873 bnc#651219).

  - Fix     patches.fixes/x25-possible-skb-leak-on-bad-facilities.pa     tch (CVE-2010-3873 bnc#651219 CVE-2010-4164 bnc#653260).

  - Update     patches.fixes/econet-4-byte-infoleak-to-the-network.patc     h (bnc#681186 CVE-2011-1173). Fix reference.

  - hwmon: (w83627ehf) Properly report thermal diode     sensors.

  - nl80211: fix overflow in ssid_len (bnc#703410     CVE-2011-2517).

  - nl80211: fix check for valid SSID size in scan     operations (bnc#703410 CVE-2011-2517).

  - x25: Prevent skb overreads when checking call user data     (CVE-2010-3873 bnc#737624).

  - x25: Handle undersized/fragmented skbs (CVE-2010-3873     bnc#737624).

  - x25: Validate incoming call user data lengths     (CVE-2010-3873 bnc#737624).

  - x25: possible skb leak on bad facilities (CVE-2010-3873     bnc#737624).

  - net: Add a flow_cache_flush_deferred function     (bnc#737624).

  - xfrm: avoid possible oopse in xfrm_alloc_dst     (bnc#737624).

  - scm: lower SCM_MAX_FD (bnc#655696 CVE-2010-4249).

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2012-0107 advisory.

    - [misc] Move exit_robust_list to mm_release, null lists on cleanup (Laszlo Ersek) [771774 750283]     {CVE-2012-0028}
    - [scsi] fix 32-on-64 block device ioctls (Paolo Bonzini) [752385 752386] {CVE-2011-4127}
    - [dm] do not forward ioctls from logical volumes to the underlying device (Paolo Bonzini) [752385 752386]     {CVE-2011-4127}
    - [block] fail SCSI passthrough ioctls on partition devices (Paolo Bonzini) [752385 752386]     {CVE-2011-4127}
    - [block] add and use scsi_blk_cmd_ioctl (Paolo Bonzini) [752385 752386] {CVE-2011-4127}
    - [fs] ext4: fix BUG_ON() in ext4_ext_insert_extent() (Lukas Czerner) [747943 747946] {CVE-2011-3638}
    - [fs] jbd2: clear BH_Delay & BH_Unwritten in journal_unmap_buffer (Eric Sandeen) [783477 783284]     {CVE-2011-4086}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-2037 advisory.

    - [netdrv] be2net: Merge fixes for CVE-2011-3347 (Joe Jin)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2012:0517 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    This update fixes the following security issue:

    * A flaw was found in the Linux kernel in the way splitting two extents in     ext4_ext_convert_to_initialized() worked. A local, unprivileged user with     the ability to mount and unmount ext4 file systems could use this flaw to     cause a denial of service. (CVE-2011-3638, Moderate)

    Red Hat would like to thank Zheng Liu for reporting this issue.

    This update also fixes the following bug:

    * Starting with Red Hat Enterprise Linux 5.6, all devices that used the     ixgbe driver would stop stripping VLAN tags when the device entered     promiscuous mode. Placing a device in a bridge group causes the device to     enter promiscuous mode. This caused various issues under certain     configurations of bridging and VLANs. A patch has been provided to address     this issue and the devices now properly strip VLAN tags in the driver     whether in promiscuous mode or not. (BZ#809790)

    Users should upgrade to these updated packages, which contain backported     patches to correct these issues. The system must be rebooted for this     update to take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:0116 advisory.

  - kernel: no access restrictions of /proc/pid/* after setuid program exec (CVE-2011-1020)

  - kernel: be2net: promiscuous mode and non-member VLAN packets DoS (CVE-2011-3347)

  - kernel: ext4: ext4_ext_insert_extent() kernel oops (CVE-2011-3638)

  - kernel: keys: NULL pointer deref in the user-defined key type (CVE-2011-4110)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

  - Using the SG_IO ioctl to issue SCSI requests to     partitions or LVM volumes resulted in the requests being     passed to the underlying block device. If a privileged     user only had access to a single partition or LVM     volume, they could use this flaw to bypass those     restrictions and gain read and write access (and be able     to issue other SCSI commands) to the entire block     device. (CVE-2011-4127, Important)

  - A flaw was found in the way the Linux kernel handled     robust list pointers of user-space held futexes across     exec() calls. A local, unprivileged user could use this     flaw to cause a denial of service or, eventually,     escalate their privileges. (CVE-2012-0028, Important)

  - A flaw was found in the Linux kernel in the way     splitting two extents in     ext4_ext_convert_to_initialized() worked. A local,     unprivileged user with the ability to mount and unmount     ext4 file systems could use this flaw to cause a denial     of service. (CVE-2011-3638, Moderate)

  - A flaw was found in the way the Linux kernel's     journal_unmap_buffer() function handled buffer head     states. On systems that have an ext4 file system with a     journal mounted, a local, unprivileged user could use     this flaw to cause a denial of service. (CVE-2011-4086,     Moderate)

  - A divide-by-zero flaw was found in the Linux kernel's     igmp_heard_query() function. An attacker able to send     certain IGMP (Internet Group Management Protocol)     packets to a target system could use this flaw to cause     a denial of service. (CVE-2012-0207, Moderate)

This update also fixes the following bugs :

  - When a host was in recovery mode and a SCSI scan     operation was initiated, the scan operation failed and     provided no error output. This bug has been fixed and     the SCSI layer now waits for recovery of the host to     complete scan operations for devices.

  - SG_IO ioctls were not implemented correctly in the     previous virtio-blk driver. Sending an SG_IO ioctl     request to a virtio-blk disk caused the sending thread     to enter an uninterruptible sleep state ('D' state).
    With this update, SG_IO ioctls are rejected by the     virtio-blk driver: the ioctl system call will simply     return an ENOTTY ('Inappropriate ioctl for device')     error and the thread will continue normally.

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

  - The proc file system could allow a local, unprivileged     user to obtain sensitive information or possibly cause     integrity issues. (CVE-2011-1020, Moderate)

  - Non-member VLAN (virtual LAN) packet handling for     interfaces in promiscuous mode and also using the be2net     driver could allow an attacker on the local network to     cause a denial of service. (CVE-2011-3347, Moderate)

  - A flaw was found in the Linux kernel in the way     splitting two extents in     ext4_ext_convert_to_initialized() worked. A local,     unprivileged user with access to mount and unmount ext4     file systems could use this flaw to cause a denial of     service. (CVE-2011-3638, Moderate)

  - A NULL pointer dereference flaw was found in the way the     Linux kernel's key management facility handled     user-defined key types. A local, unprivileged user could     use the keyctl utility to cause a denial of service.
    (CVE-2011-4110, Moderate)

This update also fixes several hundred bugs and adds enhancements.
Refer to the upstream Release Notes for information on the most significant of these changes.

All Scientific Linux 6 users are advised to install these updated packages, which correct these issues, and fix the bugs and add the enhancements noted. The system must be rebooted for this update to take effect.

Updated kernel packages that fix multiple security issues and two bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* Using the SG_IO ioctl to issue SCSI requests to partitions or LVM volumes resulted in the requests being passed to the underlying block device. If a privileged user only had access to a single partition or LVM volume, they could use this flaw to bypass those restrictions and gain read and write access (and be able to issue other SCSI commands) to the entire block device. Refer to Red Hat Knowledgebase article DOC-67874, linked to in the References, for further details about this issue. (CVE-2011-4127, Important)

* A flaw was found in the way the Linux kernel handled robust list pointers of user-space held futexes across exec() calls. A local, unprivileged user could use this flaw to cause a denial of service or, eventually, escalate their privileges. (CVE-2012-0028, Important)

* A flaw was found in the Linux kernel in the way splitting two extents in ext4_ext_convert_to_initialized() worked. A local, unprivileged user with the ability to mount and unmount ext4 file systems could use this flaw to cause a denial of service.
(CVE-2011-3638, Moderate)

* A flaw was found in the way the Linux kernel's journal_unmap_buffer() function handled buffer head states. On systems that have an ext4 file system with a journal mounted, a local, unprivileged user could use this flaw to cause a denial of service.
(CVE-2011-4086, Moderate)

* A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query() function. An attacker able to send certain IGMP (Internet Group Management Protocol) packets to a target system could use this flaw to cause a denial of service. (CVE-2012-0207, Moderate)

Red Hat would like to thank Zheng Liu for reporting CVE-2011-3638, and Simon McVittie for reporting CVE-2012-0207.

This update also fixes the following bugs :

* When a host was in recovery mode and a SCSI scan operation was initiated, the scan operation failed and provided no error output.
This bug has been fixed and the SCSI layer now waits for recovery of the host to complete scan operations for devices. (BZ#772162)

* SG_IO ioctls were not implemented correctly in the Red Hat Enterprise Linux 5 virtio-blk driver. Sending an SG_IO ioctl request to a virtio-blk disk caused the sending thread to enter an uninterruptible sleep state ('D' state). With this update, SG_IO ioctls are rejected by the virtio-blk driver: the ioctl system call will simply return an ENOTTY ('Inappropriate ioctl for device') error and the thread will continue normally. (BZ#773322)

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:0107 advisory.

  - kernel: ext4: ext4_ext_insert_extent() kernel oops (CVE-2011-3638)

  - kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS (CVE-2011-4086)

  - kernel: possible privilege escalation via SG_IO ioctl (CVE-2011-4127)

  - kernel: futex: clear robust_list on execve (CVE-2012-0028)

  - kernel: igmp: Avoid zero delay when receiving odd mixture of IGMP queries (CVE-2012-0207)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Peter Huewe discovered an information leak in the handling of reading security-related TPM data. A local, unprivileged user could read the results of a previous TPM command. (CVE-2011-1162)

Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2494)

Qianfeng Zhang discovered that the bridge networking interface incorrectly handled certain network packets. A remote attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2011-2942)

Yasuaki Ishimatsu discovered a flaw in the kernel's clock implementation. A local unprivileged attacker could exploit this causing a denial of service. (CVE-2011-3209)

Zheng Liu discovered a flaw in how the ext4 filesystem splits extents.
A local unprivileged attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-3638)

Scot Doyle discovered that the bridge networking interface incorrectly handled certain network packets. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-4087)

A bug was found in the way headroom check was performed in udp6_ufo_fragment() function. A remote attacker could use this flaw to crash the system. (CVE-2011-4326).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated kernel packages that fix multiple security issues, address several hundred bugs and add numerous enhancements are now available as part of the ongoing support and maintenance of Red Hat Enterprise Linux version 6. This is the second regular update.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* The proc file system could allow a local, unprivileged user to obtain sensitive information or possibly cause integrity issues.
(CVE-2011-1020, Moderate)

* Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service.
(CVE-2011-3347, Moderate)

* A flaw was found in the Linux kernel in the way splitting two extents in ext4_ext_convert_to_initialized() worked. A local, unprivileged user with access to mount and unmount ext4 file systems could use this flaw to cause a denial of service. (CVE-2011-3638, Moderate)

* A NULL pointer dereference flaw was found in the way the Linux kernel's key management facility handled user-defined key types. A local, unprivileged user could use the keyctl utility to cause a denial of service. (CVE-2011-4110, Moderate)

Red Hat would like to thank Kees Cook for reporting CVE-2011-1020;
Somnath Kotur for reporting CVE-2011-3347; and Zheng Liu for reporting CVE-2011-3638.

This update also fixes several hundred bugs and adds enhancements.
Refer to the Red Hat Enterprise Linux 6.2 Release Notes for information on the most significant of these changes, and the Technical Notes for further information, both linked to in the References.

All Red Hat Enterprise Linux 6 users are advised to install these updated packages, which correct these issues, and fix the bugs and add the enhancements noted in the Red Hat Enterprise Linux 6.2 Release Notes and Technical Notes. The system must be rebooted for this update to take effect.

Small number of obvious fixes from bugzilla.
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Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
181034	Oracle Linux 6 : kernel (ELSA-2011-1530)	Nessus	Oracle Linux Local Security Checks	medium
127360	NewStart CGSL MAIN 4.05 : httpd Multiple Vulnerabilities (NS-SA-2019-0118)	Nessus	NewStart CGSL Local Security Checks	critical
79507	OracleVM 2.2 : kernel (OVMSA-2013-0039)	Nessus	OracleVM Local Security Checks	high
79283	RHEL 5 : rhev-hypervisor5 (RHSA-2012:0168)	Nessus	Red Hat Local Security Checks	high
74801	openSUSE Security Update : kernel (openSUSE-SU-2012:1439-1)	Nessus	SuSE Local Security Checks	critical
74658	openSUSE Security Update : Kernel (openSUSE-SU-2012:0799-1)	Nessus	SuSE Local Security Checks	critical
68454	Oracle Linux 5 : kernel (ELSA-2012-0107)	Nessus	Oracle Linux Local Security Checks	high
68425	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2011-2037)	Nessus	Oracle Linux Local Security Checks	high
64032	RHEL 5 : kernel (RHSA-2012:0517)	Nessus	Red Hat Local Security Checks	medium
64027	RHEL 6 : kernel (RHSA-2012:0116)	Nessus	Red Hat Local Security Checks	medium
61241	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20120209)	Nessus	Scientific Linux Local Security Checks	high
61185	Scientific Linux Security Update : Scientific Linux 6 kernel on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
57922	CentOS 5 : kernel (CESA-2012:0107)	Nessus	CentOS Local Security Checks	high
57885	RHEL 5 : kernel (RHSA-2012:0107)	Nessus	Red Hat Local Security Checks	high
57058	Ubuntu 10.04 LTS : linux-lts-backport-oneiric vulnerabilities (USN-1294-1)	Nessus	Ubuntu Local Security Checks	high
57012	RHEL 6 : kernel (RHSA-2011:1530)	Nessus	Red Hat Local Security Checks	medium
56673	Fedora 14 : kernel-2.6.35.14-100.fc14 (2011-14747)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2011-3638

medium

Tenable Plugins

medium

critical

high

high

critical

critical

high

high

medium

medium

high

medium

high

high

high

medium

medium