CVE - CVE-2023-36811

CVE-ID
CVE-2023-36811	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
FEDORA:FEDORA-2023-34411d8f77 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUCQSMAWOJBCRGF6XPKEZ2TPGAPNKIWV/ FEDORA:FEDORA-2023-467632ecbe URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XOZDFIYEBIOKSIEAXUJJJFUJTAJ7TF3C/ FEDORA:FEDORA-2023-555f9fac30 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5Q3OHXERTU547SEQ3YREZXHOCYNLVD63/ MISC:https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811 URL:https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811 MISC:https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884 URL:https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884 MISC:https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99 URL:https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20230627	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20230627)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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