Vulnerability · Published Apr 6, 2021 · Assigned by mitre
CVE-2021-29136
Medium 5.5
In plain English
A medium-severity security flaw in the singularity package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 71.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | singularity | 3.7.3-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.21 | singularity | 3.7.3-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.22 | singularity | 3.7.3-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.23 | singularity | 3.7.3-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.24 | singularity | 3.7.3-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.20 | umoci | 0.4.7-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.21 | umoci | 0.4.7-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.22 | umoci | 0.4.7-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.23 | umoci | 0.4.7-r0 | ALPINE-CVE-2021-29136 |
| Alpine:v3.24 | umoci | 0.4.7-r0 | ALPINE-CVE-2021-29136 |
| Debian:12 | umoci | 0.4.7+ds-1 | DEBIAN-CVE-2021-29136 |
| Debian:13 | umoci | 0.4.7+ds-1 | DEBIAN-CVE-2021-29136 |
| Debian:14 | umoci | 0.4.7+ds-1 | DEBIAN-CVE-2021-29136 |
| Go | github.com/opencontainers/umoci | 0.4.7 | GO-2022-0815 |
| Go | github.com/opencontainers/umoci | 0.4.7 | GHSA-9m95-8hx6-7p9v |
| Ubuntu:22.04:LTS | umoci | no fix listed | UBUNTU-CVE-2021-29136 |
Affected products (as reported)
References
- http://www.openwall.com/lists/oss-security/2021/04/06/2 x_refsource_MISC
- https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v x_refsource_CONFIRM
- https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57 x_refsource_CONFIRM