PYSEC-2019-109

    Dashboard / Vulnerabilities / PYSEC-2019-109

    PYSEC-2019-109

    Published: 6 Jun 2019Last Modified: 8 Nov 2023

    Summary:

    Details: ** 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: https://gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7, https://github.com/davidhalter/parso/issues/75, https://github.com/advisories/GHSA-22mf-97vh-x8rw

    Affected packages

    Package

    Name: parso

    Purl: pkg:pypi/parso

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.5.0

    Affected versions

    0.0.1
    0.0.2
    0.0.3
    0.0.4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High