| Name | CVE-2018-15473 |
| Description | OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1474-1, DSA-4280-1, ELA-37-1 |
| Debian Bugs | 906236 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| openssh (PTS) | jessie, jessie (lts) | 1:6.7p1-5+deb8u10 | fixed |
| stretch (security) | 1:7.4p1-10+deb9u6 | fixed | |
| stretch (lts), stretch | 1:7.4p1-10+deb9u9 | fixed | |
| buster (security), buster, buster (lts) | 1:7.9p1-10+deb10u4 | fixed | |
| bullseye (security), bullseye | 1:8.4p1-5+deb11u3 | fixed | |
| bookworm (security), bookworm | 1:9.2p1-2+deb12u3 | fixed | |
| sid, trixie | 1:9.9p1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| openssh | source | wheezy | 6.0p1-4+deb7u8 | ELA-37-1 | ||
| openssh | source | jessie | 1:6.7p1-5+deb8u5 | DLA-1474-1 | ||
| openssh | source | stretch | 1:7.4p1-10+deb9u4 | DSA-4280-1 | ||
| openssh | source | (unstable) | 1:7.7p1-4 | 906236 |
https://www.openwall.com/lists/oss-security/2018/08/15/5
https://anongit.mindrot.org/openssh.git/commit/?id=74287f5df9966a0648b4a68417451dd18f079ab8
https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0
PoC at https://bugfuzz.com/stuff/ssh-check-username.py