CVE-2017-5551

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

The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31

http://www.debian.org/security/2017/dsa-3791

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6

http://www.openwall.com/lists/oss-security/2017/01/21/3

http://www.securityfocus.com/bid/95717

http://www.securitytracker.com/id/1038053

https://bugzilla.redhat.com/show_bug.cgi?id=1416126

https://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31

Details

Source: MITRE

Published: 2017-02-06

Updated: 2019-10-03

Risk Information

CVSS v2

Base Score: 3.6

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

Impact Score: 4.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 4.4

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

Impact Score: 2.5

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.9.5 (inclusive)

Tenable Plugins

View all (25 total)

IDNameProductFamilySeverity
124978EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1525)NessusHuawei Local Security Checks
high
124825EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1502)NessusHuawei Local Security Checks
high
103046RHEL 6 : MRG (RHSA-2017:2669)NessusRed Hat Local Security Checks
high
102734CentOS 7 : kernel (CESA-2017:1842) (Stack Clash)NessusCentOS Local Security Checks
high
102281Oracle Linux 7 : kernel (ELSA-2017-1842)NessusOracle Linux Local Security Checks
high
102151RHEL 7 : kernel-rt (RHSA-2017:2077)NessusRed Hat Local Security Checks
high
102143RHEL 7 : kernel (RHSA-2017:1842) (Stack Clash)NessusRed Hat Local Security Checks
high
101929Ubuntu 16.04 LTS : linux-hwe vulnerabilities (USN-3361-1)NessusUbuntu Local Security Checks
critical
101894Ubuntu 16.10 : linux, linux-raspi2 vulnerabilities (USN-3359-1)NessusUbuntu Local Security Checks
critical
99074Oracle Linux 6 : kernel (ELSA-2017-0817)NessusOracle Linux Local Security Checks
high
97886RHEL 6 : kernel (RHSA-2017:0817)NessusRed Hat Local Security Checks
high
97779Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3234-2)NessusUbuntu Local Security Checks
medium
97778Ubuntu 16.04 LTS : linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities (USN-3234-1)NessusUbuntu Local Security Checks
medium
97557Amazon Linux AMI : kernel (ALAS-2017-805)NessusAmazon Linux Local Security Checks
critical
97466SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:0575-1)NessusSuSE Local Security Checks
critical
97357Debian DSA-3791-1 : linux - security updateNessusDebian Local Security Checks
critical
97297SUSE SLES11 Security Update : kernel (SUSE-SU-2017:0494-1)NessusSuSE Local Security Checks
critical
97274openSUSE Security Update : the Linux Kernel (openSUSE-2017-245)NessusSuSE Local Security Checks
critical
97205SUSE SLES12 Security Update : kernel (SUSE-SU-2017:0471-1)NessusSuSE Local Security Checks
high
97189SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:0464-1)NessusSuSE Local Security Checks
high
97138openSUSE Security Update : the Linux Kernel (openSUSE-2017-246)NessusSuSE Local Security Checks
critical
97097SUSE SLES11 Security Update : kernel (SUSE-SU-2017:0437-1)NessusSuSE Local Security Checks
critical
96903SUSE SLES11 Security Update : kernel (SUSE-SU-2017:0333-1)NessusSuSE Local Security Checks
critical
96894Fedora 25 : kernel (2017-81fbd592d4)NessusFedora Local Security Checks
high
96890Fedora 24 : kernel (2017-6cc158c193)NessusFedora Local Security Checks
high