CVE-2026-105840
lrzsz before 0.13.0 Path Traversal via lrz Restricted Mode checkpath()
- State
- Published
- Severity
- 7.7 High
- Published
- Oct 6, 2026
- Updated
- Oct 9, 2026
- Reserved
- Oct 5, 2026
Description
lrzsz before 0.13.0 contains a path traversal vulnerability in the lrz receive utility's restricted mode that allows malicious ZMODEM senders to write files outside the current directory using absolute pathnames. Because checkpath() in src/lrz.c only rejects '../' sequences unless built with --enable-pubdir, attackers can send files named with absolute paths to overwrite any file writable by the receiving user.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.7 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
lrzszUwe Ohse |
|
References
- lrzsz 0.13.0 security changesvendor-advisory
- https://ohse.de/uwe/software/lrzsz.htmlproduct
- VulnCheck Advisory: lrzsz before 0.13.0 Path Traversal via lrz Restricted Mode checkpath()third-party-advisory
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