SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1924-1) (SACK Panic) (SACK Slowness)

High Nessus Plugin ID 126981

Synopsis

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

Description

This update for the Linux Kernel 3.12.74-60_64_104 fixes several issues.

The following security issues were fixed :

CVE-2019-11477: Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. (bsc#1137586)

CVE-2019-11478: Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. (bsc#1137586)

This update contains a regression fix for CVE-2019-11477 and CVE-2019-11478 (bsc#1140747).

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 Linux Enterprise Server for SAP 12-SP1:zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1923=1 SUSE-SLE-SAP-12-SP1-2019-1924=1 SUSE-SLE-SAP-12-SP1-2019-1925=1 SUSE-SLE-SAP-12-SP1-2019-1926=1

SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-1923=1 SUSE-SLE-SERVER-12-SP1-2019-1924=1 SUSE-SLE-SERVER-12-SP1-2019-1925=1 SUSE-SLE-SERVER-12-SP1-2019-1926=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1137597

https://bugzilla.suse.com/show_bug.cgi?id=1140747

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

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

http://www.nessus.org/u?e6215c84

Plugin Details

Severity: High

ID: 126981

File Name: suse_SU-2019-1924-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2019/07/24

Updated: 2020/01/06

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_104-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_104-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_107-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_107-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_110-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_110-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_99-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_99-xen, cpe:/o:novell:suse_linux:12

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/07/23

Vulnerability Publication Date: 2019/06/19

Reference Information

CVE: CVE-2019-11477, CVE-2019-11478