Vulnerability · Published May 7, 2021 · Assigned by GitHub_M
CVE-2021-29488Creation of files outside the Download Folder through malicious PAR2 files
Medium 4.3
In plain English
A medium-severity security flaw in sabnzbd from sabnzbd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sabnzbdplus | 3.2.1+dfsg-1 | DEBIAN-CVE-2021-29488 |
| Debian:13 | sabnzbdplus | 3.2.1+dfsg-1 | DEBIAN-CVE-2021-29488 |
| Debian:14 | sabnzbdplus | 3.2.1+dfsg-1 | DEBIAN-CVE-2021-29488 |
| Ubuntu:22.04:LTS | sabnzbdplus | no fix listed | UBUNTU-CVE-2021-29488 |
Affected products (as reported)
Weakness: CWE-23 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp x_refsource_CONFIRM