Description (CNA)
PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| PyPy / PyPy | affected 0 before 3.11.16; affected 3.12.0 before 3.12.14 |
CWE
CWE-416
References
- https://doc.pypy.org/release-v8.0.0.html
- https://github.com/pypy/pypy/releases/tag/release-pypy3.12-v8.0.0
- https://github.com/pypy/pypy/releases/tag/release-pypy3.11-v8.0.0
- https://www.vulncheck.com/advisories/pypy-pyexpat-externalentityparsercreate-use-after-free
ADP enrichment
No English description supplied.
No references supplied.