Medium severity · published Apr 6, 2021
CVE-2021-29136
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…
5.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
Singularity · Sylabs
before 3.7.3 · source: NVD
UM
Umoci · Linuxfoundation
before 0.4.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29136
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29136
Mailing List
http://www.openwall.com/lists/oss-security/2021/04/06/2
Patch
https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57
Third Party Advisory
https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v