| Name | CVE-2016-20012 |
| Description | OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openssh (PTS) | bullseye | 1:8.4p1-5+deb11u3 | vulnerable |
| bullseye (security) | 1:8.4p1-5+deb11u5 | vulnerable |
| bookworm | 1:9.2p1-2+deb12u6 | vulnerable |
| bookworm (security) | 1:9.2p1-2+deb12u5 | vulnerable |
| trixie, sid | 1:10.0p1-5 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| openssh | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://github.com/openssh/openssh-portable/pull/270
Negligible impact, not treated as a security issue by upstream