Non notée
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.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| kernel | Versions non publiées |
Références
- 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
Chronologie
- Publiée
- Dernière modification
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