Description
telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root" value for the USER environment variable.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
GNU Inetutils
Default version status: unknown
1.9.3 to ≤ 2.7affected
References
- https://www.openwall.com/lists/oss-security/2026/01/20/2 ↗
- https://www.openwall.com/lists/oss-security/2026/01/20/8 ↗
- https://www.gnu.org/software/inetutils/ ↗
- https://lists.gnu.org/archive/html/bug-inetutils/2026-01/msg00004.html ↗
- https://codeberg.org/inetutils/inetutils/commit/fd702c02497b2f398e739e3119bed0b23dd7aa7b ↗
- https://codeberg.org/inetutils/inetutils/commit/ccba9f748aa8d50a38d7748e2e60362edd6a32cc ↗
- https://www.vicarius.io/vsociety/posts/cve-2026-24061-detection-script-remote-authentication-bypass-in-gnu-inetutils-package ↗
- https://www.vicarius.io/vsociety/posts/cve-2026-24061-mitigation-script-remote-authentication-bypass-in-gnu-inetutils-package ↗
- https://redteam.ae/blog/cve-2026-24061-inetutils-telnetd-root-bypass ↗
- https://www.openwall.com/lists/oss-security/2026/01/20/2#:~:text=root@...a%3A~%20USER=' ↗
- https://www.labs.greynoise.io/grimoire/2026-01-22-f-around-and-find-out-18-hours-of-unsolicited-houseguests/index.html ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24061 ↗
- http://www.openwall.com/lists/oss-security/2026/01/22/1 ↗
- https://lists.debian.org/debian-lts-announce/2026/01/msg00025.html ↗