Critical severity · published Dec 4, 2023
CVE-2023-49291
Improper Sanitization of Branch Name Leads to Arbitrary Code Injection
9.8
CVSS
1.4%
EPSS
No
On KEV
Description
tj-actions/branch-names is a Github action to retrieve branch or tag names with support for all events. The `tj-actions/branch-names` GitHub Actions improperly references the `github.event.pull_request.head.ref` and `github.head_ref` context variables within a GitHub Actions `run` step. The head ref variable is the branch name and can be used to execute arbitrary code using a specially crafted branch name. As a result an attacker can use this vulnerability to steal secrets from or abuse `GITHUB_TOKEN` permissions. This vulnerability has been addressed in version 7.0.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BR
branch-names · tj-actions
< 7.0.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-49291
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-49291
Patch
https://github.com/tj-actions/branch-names/commit/4923d1ca41f928c24f1c1b3af9daaadfb71e6337
Patch
https://github.com/tj-actions/branch-names/commit/6c999acf206f5561e19f46301bb310e9e70d8815
Patch
https://github.com/tj-actions/branch-names/commit/726fe9ba5e9da4fcc716223b7994ffd0358af060
Exploit
https://github.com/tj-actions/branch-names/security/advisories/GHSA-8v8w-v8xg-79rf
Exploit
https://securitylab.github.com/research/github-actions-untrusted-input
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