CVE-2021-29136

low-risk

Published 2021-04-06

Open Container Initiative umoci before 0.4.7 allows attackers to overwrite arbitrary host paths via a crafted image that causes symlink traversal when "umoci unpack" or "umoci raw unpack" is used.

Do I need to act?

0.15% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.5/10 Medium

LOCAL / LOW complexity

Affected Products (2)

Umoci

Singularity

Affected Vendors

Linuxfoundation Sylabs

References (6)

Mailing List http://www.openwall.com/lists/oss-security/2021/04/06/2

Patch https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a57...

Third Party Advisory https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v

Mailing List http://www.openwall.com/lists/oss-security/2021/04/06/2

Patch https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a57...

Third Party Advisory https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v

/ 100

low-risk

Severity 18/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 7/34 · Low