CVE-2022-31256 sendmail: mail to root privilege escalation via sm-client.pre script
High 7.7
Published
Updated
Check this codebase for CVE-2022-31256 and fix it if it is affected.
What it is: CVE-2022-31256 is a high-severity vulnerability in openSUSE Factory, published on 26 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-31256 in the wild and no public exploit code.
Affected product: openSUSE Factory. 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-2022-31256/ (Markdown: https://insights.sbomify.com/CVE-2022-31256/index.md)
Local attackers can escalate privileges from mail user to root via improper link resolution in the sendmail systemd service script.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-31256?
CVE-2022-31256 is a high-severity vulnerability in openSUSE Factory, published on 26 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Improper Link Resolution Before File Access ('Link Following') vulnerability in a script called by the sendmail systemd service of openSUSE Factory allows local attackers to escalate from user mail to root. This issue affects: SUSE openSUSE Factory sendmail versions prior to 8.17.1-1.1.
Weakness: CWE-59
Which versions are affected by CVE-2022-31256?
It affects 1 product.
Linux distribution packages (26)
sendmail SUSE:Enterprise Storage 6 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Enterprise Storage 7 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Module for Legacy 12 | All versions | 8.14.9-4.6.1 |
sendmail SUSE:Linux Enterprise Module for Package Hub 15 SP3 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Module for Package Hub 15 SP4 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server 15 SP2-BCL | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server 15-LTSS | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Manager Proxy 4.1 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Manager Retail Branch Server 4.1 | All versions | 8.15.2-150000.8.9.1 |
sendmail SUSE:Manager Server 4.1 | All versions | 8.15.2-150000.8.9.1 |
sendmail openSUSE:Leap 15.3 | All versions | 8.15.2-150000.8.9.1 |
sendmail openSUSE:Leap 15.4 | All versions | 8.15.2-150000.8.9.1 |
Products include Opensuse Factory.
How do I fix CVE-2022-31256?
Apply the vendor's patch.
Is CVE-2022-31256 being exploited?
There is no known exploitation of CVE-2022-31256 in the wild and no public exploit code.
Other vulnerabilities in openSUSE Factory
Sources
Also known as GHSA-cfgc-fgg8-p3qf, SUSE-SU-2022:3898-1, SUSE-SU-2022:3899-1.