PT-2016-7214 · Linux+5 · Linux Kernel+5

Andrej Nemec · Published 2016-10-16 · Updated 2023-02-12 · CVE-2016-7097

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions through 4.8.2

Description The issue concerns the filesystem implementation in the Linux kernel, which preserves the setgid bit during a setxattr call. This allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions.

Recommendations For Linux kernel versions through 4.8.2, update to a version later than 4.8.2 to resolve the issue.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

ALT-PU-2016-2218

ALT-PU-2017-1330

CESA-2017_0817

CESA-2017_1842

CVE-2016-7097

DLA-772-1

MGASA-2016-0372

OPENSUSE-SU-2016_3021-1

OPENSUSE-SU-2016_3058-1

RHSA-2017:0817

RHSA-2017:1842

RHSA-2017:2077

RHSA-2017:2669

RHSA-2017_0817

RHSA-2017_1842

RHSA-2017_2077

SUSE-SU-2016:2912-1

SUSE-SU-2016:2976-1

SUSE-SU-2016:3304-1

SUSE-SU-2017:0333-1

SUSE-SU-2017:0471-1

SUSE-SU-2017:0494-1

SUSE-SU-2017:1102-1

USN-3146-1

USN-3146-2

USN-3147-1

USN-3161-3

USN-3161-4

USN-3162-2

USN-3422-1

USN-3422-2

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Suse

Ubuntu

References · 521

• https://github.com/torvalds/linux/commit/073931017b49d9458aa351605b43a7e34598caef · Patch
• https://osv.dev/vulnerability/USN-3161-4 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2017:2077 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3147-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-8650 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2017-3533.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9644 · Vendor Advisory
• http://marc.info/?l=linux-fsdevel&m=147162313630259&w=2 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2017:1102-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-7472 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-8964 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2016-0372 · Vendor Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073931017b49d9458aa351605b43a7e34598caef · Patch
• https://ubuntu.com/security/CVE-2016-10044 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3422-1 · Vendor Advisory