DEBIAN-CVE-2023-36811

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    DEBIAN-CVE-2023-36811

    Published: 30 Aug 2023Last Modified: 15 Sept 2026
    Upstream:
    CVE-2023-36811

    Summary:

    Details: borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. A flaw in the cryptographic authentication scheme in borgbackup allowed an attacker to fake archives and potentially indirectly cause backup data loss in the repository. The attack requires an attacker to be able to: 1. insert files (with no additional headers) into backups and 2. gain write access to the repository. This vulnerability does not disclose plaintext to the attacker, nor does it affect the authenticity of existing archives. Creating plausible fake archives may be feasible for empty or small archives, but is unlikely for large archives. The issue has been fixed in borgbackup 1.2.5. Users are advised to upgrade. Additionally to installing the fixed code, users must follow the upgrade procedure as documented in the change log. Data loss after being attacked can be avoided by reviewing the archives (timestamp and contents valid and as expected) after any "borg check --repair" and before "borg prune". There are no known workarounds for this vulnerability.

    References: https://security-tracker.debian.org/tracker/CVE-2023-36811

    Affected packages

    Package

    Name: borgbackup

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.2.4-1
    1.2.4-2
    1.2.4-3
    1.2.5-1
    1.2.5-2
    1.2.5-3
    1.2.5-4
    1.2.6-1
    1.2.6-2
    1.2.7-1
    1.2.7-2
    1.2.7-2~bpo12+1
    1.2.8-1
    1.2.8-1~bpo12+1

    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-2023-36811 | CVE-DB