CVE-2021-3864 — Improper Access Control in Kernel
Severity
7.0HIGHNVD
EPSS
0.6%
top 31.80%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedAug 26
Latest updateAug 27
Description
A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible ro…
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9
Affected Packages1 packages
Also affects: Debian Linux 10.0, 11.0, Enterprise Linux 6.0, 7.0, 9.0
Patches
🔴Vulnerability Details
3GHSA▶
GHSA-9682-f2fr-3h46: A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants↗2022-08-27
OSV▶
CVE-2021-3864: A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants↗2022-08-26
CVEList▶
CVE-2021-3864: A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants↗2022-08-26