SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1534-1) (SACK Panic) (SACK Slowness)

High Nessus Plugin ID 125995

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 8.4

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The SUSE Linux Enterprise 12 SP2 kernel version 4.4.121 was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2019-11477: A sequence of SACKs may have been crafted by a remote attacker such that one can trigger an integer overflow, leading to a kernel panic. (bsc#1137586).

CVE-2019-11478: It was possible to send a crafted sequence of SACKs which would fragment the TCP retransmission queue. A remote attacker may have been able to further exploit the fragmented queue to cause an expensive linked-list walk for subsequent SACKs received for that same TCP connection.

CVE-2019-11479: It was possible to send a crafted sequence of SACKs which would fragment the RACK send map. A remote attacker may be able to further exploit the fragmented send map to cause an expensive linked-list walk for subsequent SACKs received for that same TCP connection. This would have resulted in excess resource consumption due to low mss values.

CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network. (bnc#1136424)

CVE-2019-12382: An issue was discovered in drm_load_edid_firmware in drivers/gpu/drm/drm_edid_load.c in the Linux kernel There is an unchecked kstrdup of fwstr, which may have allowed an attacker to cause a denial of service (NULL pointer dereference and system crash).
(bnc#1136586)

CVE-2019-5489: The mincore() implementation in mm/mincore.c in the Linux kernel allowed local attackers to observe page cache access patterns of other processes on the same system, potentially allowing sniffing of secret information. (Fixing this affects the output of the fincore program.) Limited remote exploitation may have been possible, as demonstrated by latency differences in accessing public files from an Apache HTTP Server. (bnc#1120843)

CVE-2019-11833: fs/ext4/extents.c in the Linux kernel did not zero out the unused memory region in the extent tree block, which might have allowed local users to obtain sensitive information by reading uninitialized data in the filesystem. (bnc#1135281)

CVE-2018-7191: In the tun subsystem in the Linux kernel, dev_get_valid_name was not called before register_netdevice. This allowed local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.
(bnc#1135603)

CVE-2019-11190: The Linux kernel allowed local users to bypass ASLR on setuid programs (such as /bin/su) because install_exec_creds() is called too late in load_elf_binary() in fs/binfmt_elf.c, and thus the ptrace_may_access() check had a race condition when reading /proc/pid/stat. (bnc#1131543)

CVE-2019-11815: An issue was discovered in rds_tcp_kill_sock in net/rds/tcp.c in the Linux kernel There was a race condition leading to a use-after-free, related to net namespace cleanup. (bnc#1134537)

CVE-2019-11884: The do_hidp_sock_ioctl function in net/bluetooth/hidp/sock.c in the Linux kernel allowed a local user to obtain potentially sensitive information from kernel stack memory via a HIDPCONNADD command, because a name field may not have ended with a '\0' character. (bnc#1134848)

CVE-2018-17972: An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel It did not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents. (bnc#1110785)

The update package also includes non-security fixes. See advisory for details.

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

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE OpenStack Cloud 7:zypper in -t patch SUSE-OpenStack-Cloud-7-2019-1534=1

SUSE Linux Enterprise Server for SAP 12-SP2:zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-1534=1

SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-1534=1

SUSE Linux Enterprise Server 12-SP2-BCL:zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2019-1534=1

SUSE Linux Enterprise High Availability 12-SP2:zypper in -t patch SUSE-SLE-HA-12-SP2-2019-1534=1

SUSE Enterprise Storage 4:zypper in -t patch SUSE-Storage-4-2019-1534=1

OpenStack Cloud Magnum Orchestration 7:zypper in -t patch SUSE-OpenStack-Cloud-Magnum-Orchestration-7-2019-1534=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1099658

https://bugzilla.suse.com/show_bug.cgi?id=1106284

https://bugzilla.suse.com/show_bug.cgi?id=1110785

https://bugzilla.suse.com/show_bug.cgi?id=1113769

https://bugzilla.suse.com/show_bug.cgi?id=1120843

https://bugzilla.suse.com/show_bug.cgi?id=1120885

https://bugzilla.suse.com/show_bug.cgi?id=1131543

https://bugzilla.suse.com/show_bug.cgi?id=1131565

https://bugzilla.suse.com/show_bug.cgi?id=1132374

https://bugzilla.suse.com/show_bug.cgi?id=1132472

https://bugzilla.suse.com/show_bug.cgi?id=1134537

https://bugzilla.suse.com/show_bug.cgi?id=1134596

https://bugzilla.suse.com/show_bug.cgi?id=1134848

https://bugzilla.suse.com/show_bug.cgi?id=1135281

https://bugzilla.suse.com/show_bug.cgi?id=1135603

https://bugzilla.suse.com/show_bug.cgi?id=1136424

https://bugzilla.suse.com/show_bug.cgi?id=1136446

https://bugzilla.suse.com/show_bug.cgi?id=1136586

https://bugzilla.suse.com/show_bug.cgi?id=1136935

https://bugzilla.suse.com/show_bug.cgi?id=1137586

https://www.suse.com/security/cve/CVE-2018-17972/

https://www.suse.com/security/cve/CVE-2018-7191/

https://www.suse.com/security/cve/CVE-2019-11190/

https://www.suse.com/security/cve/CVE-2019-11477/

https://www.suse.com/security/cve/CVE-2019-11478/

https://www.suse.com/security/cve/CVE-2019-11479/

https://www.suse.com/security/cve/CVE-2019-11815/

https://www.suse.com/security/cve/CVE-2019-11833/

https://www.suse.com/security/cve/CVE-2019-11884/

https://www.suse.com/security/cve/CVE-2019-12382/

https://www.suse.com/security/cve/CVE-2019-3846/

https://www.suse.com/security/cve/CVE-2019-5489/

http://www.nessus.org/u?96a2c66b

Plugin Details

Severity: High

ID: 125995

File Name: suse_SU-2019-1534-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2019/06/18

Updated: 2020/01/10

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 8.4

CVSS Score Source: CVE-2019-11815

CVSS v2.0

Base Score: 9.3

Temporal Score: 6.9

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debugsource, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_114-default, cpe:/o:novell:suse_linux:12

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2019/06/17

Vulnerability Publication Date: 2013/09/25

Reference Information

CVE: CVE-2013-4343, CVE-2018-17972, CVE-2018-7191, CVE-2019-11190, CVE-2019-11477, CVE-2019-11478, CVE-2019-11479, CVE-2019-11815, CVE-2019-11833, CVE-2019-11884, CVE-2019-12382, CVE-2019-3846, CVE-2019-5489

BID: 62360