CVE-2023-36811
Archive spoofing vulnerability in borgbackup
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.
INFO
Published Date :
Aug. 30, 2023, 6:15 p.m.
Last Modified :
Nov. 21, 2024, 8:10 a.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the borgbackup package to version 1.2.5 or later.
- Review archives after borg check --repair and before borg prune.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-36811.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-36811 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-36811
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-36811 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-36811 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811 Added Reference https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884 Added Reference https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99 Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/5Q3OHXERTU547SEQ3YREZXHOCYNLVD63/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/XOZDFIYEBIOKSIEAXUJJJFUJTAJ7TF3C/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ZUCQSMAWOJBCRGF6XPKEZ2TPGAPNKIWV/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Sep. 15, 2023
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/XOZDFIYEBIOKSIEAXUJJJFUJTAJ7TF3C/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 15, 2023
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/5Q3OHXERTU547SEQ3YREZXHOCYNLVD63/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 15, 2023
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ZUCQSMAWOJBCRGF6XPKEZ2TPGAPNKIWV/ [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 06, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811 No Types Assigned https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811 Third Party Advisory Changed Reference Type https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884 No Types Assigned https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884 Patch Changed Reference Type https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99 No Types Assigned https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99 Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:borgbackup:borg:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.5
Vulnerability Scoring Details
Base CVSS Score: 4.7
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} -0.00%
score
0.15670
percentile