DEBIAN-CVE-2021-41991

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    DEBIAN-CVE-2021-41991

    Published: 18 Oct 2021Last Modified: 21 Oct 2026
    Upstream:
    CVE-2021-41991

    Summary:

    Details: The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.

    References: https://security-tracker.debian.org/tracker/CVE-2021-41991

    Affected packages

    Package

    Name: strongswan

    Purl: pkg:deb/debian/strongswan?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.9.4-1

    Affected versions

    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
    DEBIAN-CVE-2021-41991 | CVE-DB