CVE-2021-29136 describes a symlink traversal vulnerability in Open Container Initiative umoci versions prior to 0.4.7, affecting Linux Foundation and Sylabs Singularity and umoci products. An attacker can craft a malicious image that, when unpacked using "umoci unpack" or "umoci raw unpack," allows them to overwrite arbitrary host paths. Rated as Medium severity (CVSS 5.5), this local attack requires low privileges and user interaction is not required, but it only impacts integrity (I:H) with no confidentiality or availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.4.7CPE matchmatch criteria | cpe:2.3:a:linuxfoundation:umoci:*:*:*:*:*:*:*:* | ||
< 3.7.3CPE matchmatch criteria | cpe:2.3:a:sylabs:singularity:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.