Some vulnerabilities were discovered and corrected in the Linux 2.6 kernel :

The tcp_sacktag_write_queue function in the Linux kernel 2.6.21 through 2.6.23.7 allows remote attackers to cause a denial of service via crafted ACK responses that trigger a NULL pointer dereference (CVE-2007-5501).

To update your kernel, please follow the directions located at :

http://www.mandriva.com/en/security/kernelupdate

This kernel update fixes the following security problems :

++ CVE-2007-5500: A buggy condition in the ptrace attach logic can be used by local attackers to hang the machine.

++ CVE-2007-5501: The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

++ CVE-2007-5904: Multiple buffer overflows in CIFS VFS allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via long SMB responses that trigger the overflows in the SendReceive function.

This requires the attacker to set up a malicious Samba/CIFS server and getting the client to connect to it.

and the following non security bugs :

++ Kernel update to 2.6.22.13 (includes the fixes for CVE-2007-5500 and CVE-2007-5501 described above)

++ patches.fixes/input-add-ms-vm-to-noloop.patch: add i8042.noloop quirk for Microsoft Virtual Machine [#297546]

++ patches.fixes/mac80211_fix_scan.diff: Make per-SSID scanning work [#299598] [#327684]

++ patches.drivers/kobil_sct_backport.patch: Fix segfault for Kobil USB Plus cardreaders [#327664]

++ patches.arch/acpi_thermal_passive_blacklist.patch: Avoid critical temp shutdowns on specific ThinkPad T4x(p) and R40 [#333043]

++ patches.fixes/microtek_hal.diff: Make the microtek driver work with HAL [#339743]

++ patches.fixes/pci-fix-unterminated-pci_device_id-lists: fix unterminated pci_device_id lists [#340527]

++ patches.fixes/nfsacl-retval.diff: knfsd: fix spurious EINVAL errors on first access of new filesystem [#340873]

Update to kernel 2.6.23.9-rc1:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.2 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.3 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.4 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.5 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.6 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.7 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8

CVE-2007-5501: The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.24-rc2 and earlier allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

CVE-2007-5500: The wait_task_stopped function in the Linux kernel before 2.6.23.8 checks a TASK_TRACED bit instead of an exit_state value, which allows local users to cause a denial of service (machine crash) via unspecified vectors.

Additional fixes: Major wireless updates. Fix oops in netfilter NAT module (#259501) libata: fix resume on some systems libata: fix pata_serverworks with some drive combinations Initial FireWire OHCI 1.0 Isochronous Receive support (#344851) Disable USB autosuspend by default. Fix oops in CIFS when mounting a filesystem a second time.
Restore platform module autoloading, e.g. pcspkr. Fix failure to boot on 486DX4 (and possibily other CPUs.)

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.

Update to Linux 2.6.22.14:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.10 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.11 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.12 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.13 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.14

CVE-2007-5501: The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.24-rc2 and earlier allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

CVE-2007-5500: The wait_task_stopped function in the Linux kernel before 2.6.23.8 checks a TASK_TRACED bit instead of an exit_state value, which allows local users to cause a denial of service (machine crash) via unspecified vectors.

Plus: Fix compat class device links in sysfs. Fix boot speed when virtualized on Intel VT processors. Fix ppc64 vDSO DWARF info for CR register (#350291)

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.

Update to kernel 2.6.23.9-rc1:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.2 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.3 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.4 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.5 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.6 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.7 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.9

CVE-2007-5501: The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.24-rc2 and earlier allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

CVE-2007-5500: The wait_task_stopped function in the Linux kernel before 2.6.23.8 checks a TASK_TRACED bit instead of an exit_state value, which allows local users to cause a denial of service (machine crash) via unspecified vectors.

Additional fixes: Fix oops in selinux bitmap code (#394501) Fix oops in netfilter NAT module Major wireless driver updates. libata: fix resume for some devices libata: possible fix for bug #379971 libata:
fix broken sata_sis driver (#365331) Automatically load the Dell dcdbas driver (#248257) Initial FireWire OHCI 1.0 Isochronous Receive support (#344851) Touchpad support for Dell Vostro 1400 and Thinkpad R61 (#375471)

-63: Fix b43 Revision D error messages. Restore ability to add/remove virtual i/fs to mac80211 devices

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.

The wait_task_stopped function in the Linux kernel before 2.6.23.8 checks a TASK_TRACED bit instead of an exit_state value, which allows local users to cause a denial of service (machine crash) via unspecified vectors. NOTE: some of these details are obtained from third-party information. (CVE-2007-5500)

The tcp_sacktag_write_queue function in the Linux kernel 2.6.21 through 2.6.23.7 allowed remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference (CVE-2007-5501).

The do_corefump function in fs/exec.c in the Linux kernel prior to 2.6.24-rc3 did not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which could possibly allow local users to obtain sensitive information (CVE-2007-6206).

VFS in the Linux kernel before 2.6.22.16 performed tests of access mode by using the flag variable instead of the acc_mode variable, which could possibly allow local users to bypass intended permissions and remove directories (CVE-2008-0001).

The Linux kernel prior to 2.6.22.17, when using certain drivers that register a fault handler that does not perform range checks, allowed local users to access kernel memory via an out-of-range offset (CVE-2008-0007).

A flaw in the vmsplice system call did not properly verify address arguments passed by user-space processes, which allowed local attackers to overwrite arbitrary kernel memory and gain root privileges (CVE-2008-0600).

Mandriva urges all users to upgrade to these new kernels immediately as the CVE-2008-0600 flaw is being actively exploited. This issue only affects 2.6.17 and newer Linux kernels, so neither Corporate 3.0 nor Corporate 4.0 are affected.

Additionally, this kernel updates the version from 2.6.22.12 to 2.6.22.18 and fixes numerous other bugs, including :

  - fix freeze when ejecting a cm40x0 PCMCIA card

    - fix crash on unloading netrom

    - fixes alsa-related sound issues on Dell XPS M1210 and       M1330 models

    - the HZ value was increased on the laptop kernel to       increase interactivity and reduce latency

  - netfilter ipset, psd, and ifwlog support was re-enabled

    - unionfs was reverted to a working 1.4 branch that is       less buggy

To update your kernel, please follow the directions located at :

http://www.mandriva.com/en/security/kernelupdate

The minix filesystem did not properly validate certain filesystem values. If a local attacker could trick the system into attempting to mount a corrupted minix filesystem, the kernel could be made to hang for long periods of time, resulting in a denial of service.
(CVE-2006-6058)

Certain calculations in the hugetlb code were not correct. A local attacker could exploit this to cause a kernel panic, leading to a denial of service. (CVE-2007-4133)

Eric Sesterhenn and Victor Julien discovered that the hop-by-hop IPv6 extended header was not correctly validated. If a system was configured for IPv6, a remote attacker could send a specially crafted IPv6 packet and cause the kernel to panic, leading to a denial of service. This was only vulnerable in Ubuntu 7.04. (CVE-2007-4567)

Permissions were not correctly stored on JFFS2 ACLs. For systems using ACLs on JFFS2, a local attacker may gain access to private files.
(CVE-2007-4849)

Chris Evans discovered that the 802.11 network stack did not correctly handle certain QOS frames. A remote attacker on the local wireless network could send specially crafted packets that would panic the kernel, resulting in a denial of service. (CVE-2007-4997)

The Philips USB Webcam driver did not correctly handle disconnects. If a local attacker tricked another user into disconnecting a webcam unsafely, the kernel could hang or consume CPU resources, leading to a denial of service. (CVE-2007-5093)

Scott James Remnant discovered that the waitid function could be made to hang the system. A local attacker could execute a specially crafted program which would leave the system unresponsive, resulting in a denial of service. (CVE-2007-5500)

Ilpo Jarvinen discovered that it might be possible for the TCP stack to panic the kernel when receiving a crafted ACK response. Only Ubuntu 7.10 contained the vulnerable code, and it is believed not to have been exploitable. (CVE-2007-5501)

When mounting the same remote NFS share to separate local locations, the first location's mount options would apply to all subsequent mounts of the same NFS share. In some configurations, this could lead to incorrectly configured permissions, allowing local users to gain additional access to the mounted share.
(https://launchpad.net/bugs/164231)

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.

The minix filesystem did not properly validate certain filesystem values. If a local attacker could trick the system into attempting to mount a corrupted minix filesystem, the kernel could be made to hang for long periods of time, resulting in a denial of service. This was only vulnerable in Ubuntu 7.04 and 7.10. (CVE-2006-6058)

The signal handling on PowerPC systems using HTX allowed local users to cause a denial of service via floating point corruption. This was only vulnerable in Ubuntu 6.10 and 7.04. (CVE-2007-3107)

The Linux kernel did not properly validate the hop-by-hop IPv6 extended header. Remote attackers could send a crafted IPv6 packet and cause a denial of service via kernel panic. This was only vulnerable in Ubuntu 7.04. (CVE-2007-4567)

The JFFS2 filesystem with ACL support enabled did not properly store permissions during inode creation and ACL setting. Local users could possibly access restricted files after a remount. This was only vulnerable in Ubuntu 7.04 and 7.10. (CVE-2007-4849)

Chris Evans discovered an issue with certain drivers that use the ieee80211_rx function. Remote attackers could send a crafted 802.11 frame and cause a denial of service via crash. This was only vulnerable in Ubuntu 7.04 and 7.10. (CVE-2007-4997)

Alex Smith discovered an issue with the pwc driver for certain webcam devices. A local user with physical access to the system could remove the device while a userspace application had it open and cause the USB subsystem to block. This was only vulnerable in Ubuntu 7.04.
(CVE-2007-5093)

Scott James Remnant discovered a coding error in ptrace. Local users could exploit this and cause the kernel to enter an infinite loop.
This was only vulnerable in Ubuntu 7.04 and 7.10. (CVE-2007-5500)

It was discovered that the Linux kernel could dereference a NULL pointer when processing certain IPv4 TCP packets. A remote attacker could send a crafted TCP ACK response and cause a denial of service via crash. This was only vulnerable in Ubuntu 7.10. (CVE-2007-5501)

Warren Togami discovered that the hrtimer subsystem did not properly check for large relative timeouts. A local user could exploit this and cause a denial of service via soft lockup. (CVE-2007-5966)

Venustech AD-LAB discovered a buffer overflow in the isdn net subsystem. This issue is exploitable by local users via crafted input to the isdn_ioctl function. (CVE-2007-6063)

It was discovered that the isdn subsystem did not properly check for NULL termination when performing ioctl handling. A local user could exploit this to cause a denial of service. (CVE-2007-6151)

Blake Frantz discovered that when a root process overwrote an existing core file, the resulting core file retained the previous core file's ownership. Local users could exploit this to gain access to sensitive information. (CVE-2007-6206)

Hugh Dickins discovered the when using the tmpfs filesystem, under rare circumstances, a kernel page may be improperly cleared. A local user may be able to exploit this and read sensitive kernel data or cause a denial of service via crash. (CVE-2007-6417)

Bill Roman discovered that the VFS subsystem did not properly check access modes. A local user may be able to gain removal privileges on directories. (CVE-2008-0001).

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.

ID	Name	Product	Family	Published	Updated	Severity
37602	Mandrake Linux Security Advisory : kernel (MDKSA-2007:226)	Nessus	Mandriva Local Security Checks	4/23/2009	1/6/2021	high
29248	openSUSE 10 Security Update : kernel (kernel-4749)	Nessus	SuSE Local Security Checks	12/7/2007	1/14/2021	high
29264	Fedora 7 : kernel-2.6.23.8-34.fc7 (2007-3751)	Nessus	Fedora Local Security Checks	12/11/2007	1/11/2021	high
29285	Fedora Core 6 : kernel-2.6.22.14-72.fc6 (2007-759)	Nessus	Fedora Local Security Checks	12/11/2007	1/11/2021	high
29193	Fedora 8 : kernel-2.6.23.8-63.fc8 (2007-3837)	Nessus	Fedora Local Security Checks	12/4/2007	1/11/2021	high
36924	Mandriva Linux Security Advisory : kernel (MDVSA-2008:044)	Nessus	Mandriva Local Security Checks	4/23/2009	1/6/2021	high
29740	Ubuntu 6.10 / 7.04 / 7.10 : linux-source-2.6.17/20/22 vulnerabilities (USN-558-1)	Nessus	Ubuntu Local Security Checks	12/19/2007	1/19/2021	high
30183	Ubuntu 6.10 / 7.04 / 7.10 : linux-source-2.6.17/20/22 vulnerabilities (USN-574-1)	Nessus	Ubuntu Local Security Checks	2/5/2008	1/19/2021	high

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