CVE-2021-38305
23andMe Yamale before 3.0.8 allows remote attackers to execute arbitrary code via a crafted schema file.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
23andMe Yamale before 3.0.8 allows remote attackers to execute arbitrary code via a crafted schema file. The schema parser uses eval as part of its processing, and tries to protect from malicious expressions by limiting the builtins that are passed to the eval. When processing the schema, each line is run through Python's eval function to make the validator available. A well-constructed string within the schema rules can execute system commands; thus, by exploiting the vulnerability, an attacker can run arbitrary code on the image that invokes Yamale.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.49% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- 23andme/yamale
- Source
- cve@mitre.org
References
- https://github.com/23andMe/Yamale/pull/165Patch, Third Party Advisory
- https://github.com/23andMe/Yamale/releases/tag/3.0.8Release Notes, Third Party Advisory
- https://github.com/23andMe/Yamale/pull/165Patch, Third Party Advisory
- https://github.com/23andMe/Yamale/releases/tag/3.0.8Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.