Not rated
CVE-2021-3864 A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| kernel | Versions not published |
References
- www.openwall.com www.openwall.com
- bugzilla.redhat.com bugzilla.redhat.com
- access.redhat.com access.redhat.com
- lore.kernel.org lore.kernel.org
- lore.kernel.org lore.kernel.org
- lore.kernel.org lore.kernel.org
- security-tracker.debian.org security-tracker.debian.org
Timeline
- Published
- Last modified
Other CVEs of kernel
The 279 CVEs of kernel →
CVE-2024-1312
A use-after-free flaw was found in the Linux kernel's Memory Management subsystem when a user wins two races at the same…
5.1
Medium
CVE-2023-6200
A race condition was found in the Linux Kernel
7.5
High
CVE-2023-6560
An out-of-bounds memory access flaw was found in the io_uring SQ/CQ rings functionality in the Linux kernel
5.5
Medium
CVE-2023-5972
A null pointer dereference flaw was found in the nft_inner.c functionality of netfilter in the Linux kernel
7.0
High