CVE-2018-1091

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70

http://openwall.com/lists/oss-security/2018/03/27/4

https://access.redhat.com/errata/RHSA-2018:1318

https://access.redhat.com/security/cve/cve-2018-1091

https://bugzilla.redhat.com/show_bug.cgi?id=1558149

https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70

https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5

Details

Source: MITRE

Published: 2018-03-27

Updated: 2018-05-10

Type: CWE-119

Risk Information

CVSS v2

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.13.4 (inclusive)

Tenable Plugins

View all (10 total)

IDNameProductFamilySeverity
125282SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1287-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)NessusSuSE Local Security Checks
high
124972EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1519)NessusHuawei Local Security Checks
high
110245CentOS 7 : kernel (CESA-2018:1318)NessusCentOS Local Security Checks
high
110197Amazon Linux AMI : kernel (ALAS-2018-1023)NessusAmazon Linux Local Security Checks
high
110196Amazon Linux 2 : kernel (ALAS-2018-1023)NessusAmazon Linux Local Security Checks
high
109665Oracle Linux 7 : kernel (ELSA-2018-1318)NessusOracle Linux Local Security Checks
high
109644Scientific Linux Security Update : kernel on SL7.x x86_64 (20180508)NessusScientific Linux Local Security Checks
high
109633RHEL 7 : kernel (RHSA-2018:1318)NessusRed Hat Local Security Checks
high
109310SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:1048-1)NessusSuSE Local Security Checks
high
109103openSUSE Security Update : the Linux Kernel (openSUSE-2018-377)NessusSuSE Local Security Checks
medium