CVE-2023-36811

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Summary

CVECVE-2023-36811
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-08-30 18:15:00 UTC
Updated2023-09-15 22:15:00 UTC
Descriptionborgbackup 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.

Risk And Classification

Problem Types: CWE-347

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Borgbackup Borg All All All All

References

ReferenceSourceLinkTags
Merge pull request #7789 from ThomasWaldmann/archive-tam-verify-master · borgbackup/borg@3eb0701 · GitHub MISC github.com
[SECURITY] Fedora 38 Update: borgbackup-1.2.6-1.fc38 - package-announce - Fedora Mailing-Lists MISC lists.fedoraproject.org
[SECURITY] Fedora 39 Update: borgbackup-1.2.6-1.fc39 - package-announce - Fedora Mailing-Lists MISC lists.fedoraproject.org
Pre-1.2.5 archives spoofing vulnerability · Advisory · borgbackup/borg · GitHub MISC github.com
Important notes MISC github.com
[SECURITY] Fedora 37 Update: borgbackup-1.2.6-1.fc37 - package-announce - Fedora Mailing-Lists MISC lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 284511 Fedora Security Update for borgbackup (FEDORA-2023-555f9fac30)
  • 284512 Fedora Security Update for borgbackup (FEDORA-2023-34411d8f77)
  • 285268 Fedora Security Update for borgbackup (FEDORA-2023-467632ecbe)
  • 505985 Alpine Linux Security Update for borgbackup

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