CVE-2021-3864

Updated: 2023-11-04 21:10:10.848138

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 root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 7

Status

OS name Project name Version Score Severity Status Errata Last updated
AlmaLinux 9.2 ESU kernel 5.14.0 7 HIGH Needs Triage 2023-11-07 16:11:27
AlmaLinux 9.2 FIPS kernel 5.14.0 7 HIGH Needs Triage 2023-11-20 10:06:54
CentOS 6 ELS kernel 2.6.32 7 HIGH Ignored 2023-10-27 11:18:13
CentOS 8.4 ELS kernel 4.18.0 7 HIGH Not Vulnerable 2022-10-10 11:03:06
CentOS 8.5 ELS kernel 4.18.0 7 HIGH Not Vulnerable 2022-10-10 14:03:17
CloudLinux 6 ELS kernel 2.6.32 7 HIGH Needs Triage 2022-09-02 00:04:24
Oracle Linux 6 ELS kernel 2.6.32 7 HIGH Ignored 2023-10-27 11:18:13
Ubuntu 16.04 ELS linux 4.4.0 7 HIGH Needs Triage 2022-09-09 03:40:40
Ubuntu 16.04 ELS linux-hwe 4.15.0 7 HIGH Needs Triage 2023-10-26 17:27:10
Ubuntu 18.04 ELS linux 4.15.0 7 HIGH Needs Triage 2023-10-26 17:28:08