Description
Unspecified vulnerability in portable OpenSSH before 4.4, when running on some platforms, allows remote attackers to determine the validity of usernames via unknown vectors involving a GSSAPI "authentication abort."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssh | 1:4.6p1-1 | — |
| Debian 13 | openssh | 1:4.6p1-1 | — |
| Debian 12 | openssh | 1:4.6p1-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | openssh +3 | 4.3p2-24.el5 | RHSA-2007:0540 |
| RHEL 4 | openssh +4 | 3.9p1-8.RHEL4.24 | RHSA-2007:0703 |
Advisories 2
- RHSA-2007:0703 Red Hat Security Advisory: openssh security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0540 Red Hat Security Advisory: openssh security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 20245 vdb-entry
- 20061005 rPSA-2006-0185-1 gnome-ssh-askpass openssh openssh-client openssh-server mailing-list
- http://openssh.org/txt/release-4.4
- TA07-072A third-party-advisory
- GLSA-200611-06 vendor-advisory
- SUSE-SA:2006:062 vendor-advisory
- APPLE-SA-2007-03-13 vendor-advisory
- 29266 vdb-entry
- http://docs.info.apple.com/article.html?artnum=305214
- 27588 third-party-advisory
- https://issues.rpath.com/browse/RPL-681
- 1016939 vdb-entry
- http://support.avaya.com/elmodocs2/security/ASA-2007-527.htm
- oval:org.mitre.oval:def:10178 vdb-entry signature
- openssh-gssapi-user-enumeration(29255) vdb-entry
- 22495 third-party-advisory
- 22823 third-party-advisory
- SSA:2006-272-02 vendor-advisory
- [openssh-unix-dev] 20060927 Announce: OpenSSH 4.4 released mailing-list
- RHSA-2007:0703 vendor-advisory
- RHSA-2006:0697 vendor-advisory
- ADV-2007-0930 vdb-entry
- 28320 third-party-advisory
- 22173 third-party-advisory
- RHSA-2007:0540 vendor-advisory
- 22158 third-party-advisory
- 24479 third-party-advisory