Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-29136 |
CWE-ID | CWE-61 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
umoci Other software / Other software solutions |
Vendor | umo.ci |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU51962
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-29136
CWE-ID:
CWE-61 - UNIX Symbolic Link (Symlink) Following
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a symlink following issue when processing crafted images. A remote attacker can create a specially crafted image with symbolic link to a critical file on the system and overwrite it, when "umoci unpack" or "umoci raw unpack" is used.
Successful exploitation of this vulnerability may result in privilege escalation.
MitigationInstall updates from vendor's website.
Vulnerable software versionsumoci: 0.4.0 - 0.4.6
External linkshttp://www.openwall.com/lists/oss-security/2021/04/06/2
http://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57
http://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.