CVE-2021-3493
- Reference to the description:
- 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.
- Last updated date:
- 07/07/2023
Reports
ACTIVELY EXPLOITED
- Type:
- exploitation
- Confidence:
- HIGH
- Date of publishing:
- 09/06/2022
- Reference url to background
https://cybersecurity.att.com/blogs/labs-research/shikitega-new-stealthy-malware-targeting-linux
- Type:
- exploitation
- Confidence:
- HIGH
- Date of publishing:
- 10/20/2022
- Reference url to background
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 04/19/2021
- Reference url to background
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 04/22/2021
- Reference url to background
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 07/07/2021
- Reference url to background
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 09/12/2021
- Reference url to background
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 12/02/2021
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 12/16/2021
- Reference url to background
http://packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076-1.html
- Type:
- exploit
- Confidence:
- HIGH
- Date of publishing:
- 12/16/2021
- Reference url to background
http://packetstormsecurity.com/files/165151/Ubuntu-Overlayfs-Local-Privilege-Escalation.html