8.8
Élevée
Exploitée
CVE-2021-3493 Linux Kernel Privilege Escalation Vulnerability
Exploitation active constatée
· catalogue CISA KEV
Action attendue
Apply updates per vendor instructions.
Campagnes de rançongiciel
Non constatée à ce jour
Faiblesse
CWE-862
Description
The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux kernel 5.8 | premières → < 5.8.0-50.56 | 5.8.0-50.56 |
| Linux kernel 5.4 | premières → < 5.4.0-72.80 | 5.4.0-72.80 |
| Linux kernel 4.15 | premières → < 4.15.0-142.146 | 4.15.0-142.146 |
| Linux kernel 4.4 | premières → < 4.4.0-209.241 | 4.4.0-209.241 |
Références
- ubuntu.com ubuntu.com
- git.kernel.org git.kernel.org
- www.openwall.com www.openwall.com
- packetstormsecurity.com packetstormsecurity.com
- packetstormsecurity.com packetstormsecurity.com
- packetstormsecurity.com packetstormsecurity.com
Chronologie
- Publiée
- Ajoutée au catalogue KEV
- Dernière modification