CVE-2021-32825

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    CVE-2021-32825

    Published: 16 Aug 2021Last Modified: 8 Jul 2026

    Summary:

    Details: bblfshd is an open source self-hosted server for source code parsing. In bblfshd before commit 4265465b9b6fb5663c30ee43806126012066aad4 there is a "zipslip" vulnerability. The unsafe handling of symbolic links in an unpacking routine may enable attackers to read and/or write to arbitrary locations outside the designated target folder. This issue may lead to arbitrary file write (with same permissions as the program running the unpack operation) if the attacker can control the archive file. Additionally, if the attacker has read access to the unpacked files, he may be able to read arbitrary system files the parent process has permissions to read. For more details including a PoC see the referenced GHSL-2020-258.

    References: https://github.com/bblfsh/bblfshd/commit/4265465b9b6fb5663c30ee43806126012066aad4, https://github.com/bblfsh/bblfshd/pull/341, https://securitylab.github.com/advisories/GHSL-2020-258-zipslip-bblfshd/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -4265465b9b6fb5663c30ee43806126012066aad4

    Affected versions

    v2.16.1
    v2.16.0

    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
    CVE-2021-32825 | CVE-DB