high7.8
CVE-2021-38305
Command injection in Yamale
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | yamale | < 3.0.8 | 3.0.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| 23andme | Yamale | before 3.0.8 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/23andMe/Yamale/pull/165
- https://github.com/23andMe/Yamale/releases/tag/3.0.8
- https://github.com/advisories/GHSA-435p-f82x-mxwm
- https://nvd.nist.gov/vuln/detail/CVE-2021-38305
- https://github.com/pypa/advisory-database/tree/main/vulns/yamale/PYSEC-2021-119.yaml