CVE-2019-12760: Deserialization vulnerability exists in parso

June 13, 2019 (updated October 9, 2024)

** DISPUTED ** A deserialization vulnerability exists in the way parso through 0.4.0 handles grammar parsing from the cache. Cache loading relies on pickle and, provided that an evil pickle can be written to a cache grammar file and that its parsing can be triggered, this flaw leads to Arbitrary Code Execution. NOTE: This is disputed because “the cache directory is not under control of the attacker in any common configuration.”

References

gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7
github.com/advisories/GHSA-22mf-97vh-x8rw
github.com/davidhalter/parso
github.com/davidhalter/parso/issues/75
github.com/pypa/advisory-database/tree/main/vulns/parso/PYSEC-2019-109.yaml
nvd.nist.gov/vuln/detail/CVE-2019-12760

Code Behaviors & Features

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