CVE-2018-15473: Race Condition
Last updated 25 August 2025
Other sources
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.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/opensshto a version that resolves this vulnerability.Fixed in 1:7.7p1-4Fixed in 1:7.4p1-10+deb9u4 - Upgrade
Upgrade
debian/opensshto a version that resolves this vulnerability.Fixed in 1:8.4p1-5+deb11u3Fixed in 1:8.4p1-5+deb11u7Fixed in 1:9.2p1-2+deb12u10Fixed in 1:9.2p1-2+deb12u9Fixed in 1:10.0p1-7+deb13u4Fixed in 1:10.0p1-7+deb13u2Fixed in 1:10.3p1-4
Event History
Frequently Asked Questions
What is CVE-2018-15473?
CVE-2018-15473 is a user enumeration vulnerability in OpenSSH through 7.7.
How severe is CVE-2018-15473?
CVE-2018-15473 has a severity score of 5.3, which is considered high.
Which versions of OpenSSH are affected by CVE-2018-15473?
OpenSSH versions up to and including 7.7 are affected by CVE-2018-15473.
How can I fix CVE-2018-15473?
To fix CVE-2018-15473, update OpenSSH to version 7.7 or higher.
Where can I find more information about CVE-2018-15473?
More information about CVE-2018-15473 can be found at the following references: [link1](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15473), [link2](http://www.openwall.com/lists/oss-security/2018/08/15/5), [link3](https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0).