Vulnerability Details : CVE-2021-29488
SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.
Vulnerability category: Directory traversal
Products affected by CVE-2021-29488
- cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*
- cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-29488
0.32%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-29488
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
3.9
|
1.4
|
NIST | |
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2021-29488
-
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-29488
-
https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp
Creation of files outside the Download Folder through malicious PAR2 files · Advisory · sabnzbd/sabnzbd · GitHubPatch;Third Party Advisory
Jump to