Vulnerability · Published Aug 9, 2021 · Assigned by mitre
CVE-2021-38305
High 7.8
In plain English
A high-severity security flaw in the yamale package (PyPI). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | yamale | 3.0.8 | GHSA-435p-f82x-mxwm |
| PyPI | yamale | 3.0.8 | PYSEC-2021-119 |
Affected products (as reported)
References
- https://github.com/23andMe/Yamale/releases/tag/3.0.8 x_refsource_MISC
- https://github.com/23andMe/Yamale/pull/165 x_refsource_MISC