CVE-2018-15473 Information disclosure in n/a
Medium 5.9
Published
Updated
Check this codebase for CVE-2018-15473 and fix it if it is affected.
What it is: CVE-2018-15473 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 17 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-15473 exists.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2018-15473/ (Markdown: https://insights.sbomify.com/CVE-2018-15473/index.md)
OpenSSH allows attackers to enumerate valid usernames due to a race condition in authentication packet parsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-15473?
CVE-2018-15473 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 17 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-362
Which versions are affected by CVE-2018-15473?
It affects 22 products.
Linux distribution packages (40)
openssh Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
openssh-askpass Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
openssh-clients Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
openssh-debuginfo Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
openssh-ldap Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
openssh-server Red Hat:enterprise_linux:6::client | All versions | 0:5.3p1-124.el6_10 |
pam_ssh_agent_auth Red Hat:enterprise_linux:6::client | All versions | 0:0.9.3-124.el6_10 |
openssh Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
openssh-askpass Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
openssh-clients Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
openssh-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
openssh-ldap Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
openssh-server Red Hat:enterprise_linux:6::computenode | All versions | 0:5.3p1-124.el6_10 |
pam_ssh_agent_auth Red Hat:enterprise_linux:6::computenode | All versions | 0:0.9.3-124.el6_10 |
openssh Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
openssh-askpass Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
openssh-clients Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
openssh-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
openssh-ldap Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
openssh-server Red Hat:enterprise_linux:6::server | All versions | 0:5.3p1-124.el6_10 |
pam_ssh_agent_auth Red Hat:enterprise_linux:6::server | All versions | 0:0.9.3-124.el6_10 |
openssh Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
openssh-askpass Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
openssh-clients Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
openssh-debuginfo Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
openssh-ldap Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
openssh-server Red Hat:enterprise_linux:6::workstation | All versions | 0:5.3p1-124.el6_10 |
pam_ssh_agent_auth Red Hat:enterprise_linux:6::workstation | All versions | 0:0.9.3-124.el6_10 |
openssh Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-askpass Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-cavs Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-clients Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-keycat Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-ldap Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-server Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
openssh-server-sysvinit Red Hat:enterprise_linux:7::client | All versions | 0:7.4p1-21.el7 |
pam_ssh_agent_auth Red Hat:enterprise_linux:7::client | All versions | 0:0.10.3-2.21.el7 |
openssh Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-21.el7 |
openssh-askpass Red Hat:enterprise_linux:7::computenode | All versions | 0:7.4p1-21.el7 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Netapp Aff Baseboard Management Controller, Netapp Cloud Backup, Netapp Clustered Data Ontap, Netapp Cn1610 Firmware and 16 more.
How do I fix CVE-2018-15473?
Apply the vendor's patch.
Is CVE-2018-15473 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-15473 exists.
Public exploit code: 1 Metasploit module, 3 Exploit-DB entries and 41 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-15473, DEBIAN-CVE-2018-15473, DLA-1474-1, DSA-4280-1, GHSA-c8qw-h3f6-fv63, MGASA-2018-0363 and 12 more.