CVE-2021-35242 A valid CSRF token is present in response to an invalid request
High 8.3
Published
Updated
Check this codebase for CVE-2021-35242 and fix it if it is affected.
What it is: CVE-2021-35242 is a high-severity vulnerability in Solarwinds Serv-U, published on 6 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-35242 in the wild and no public exploit code.
Affected product: Solarwinds Serv-U. 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-2021-35242/ (Markdown: https://insights.sbomify.com/CVE-2021-35242/index.md)
Serv-U server leaks valid CSRF tokens in responses to invalid requests, allowing attackers to bypass CSRF protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-35242?
CVE-2021-35242 is a high-severity vulnerability in Solarwinds Serv-U, published on 6 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Serv-U server responds with valid CSRFToken when the request contains only Session.
Weakness: CWE-352
Which versions are affected by CVE-2021-35242?
It affects 1 product.
Products include Solarwinds Serv-U.
How do I fix CVE-2021-35242?
No fix has been published for CVE-2021-35242 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-35242 being exploited?
There is no known exploitation of CVE-2021-35242 in the wild and no public exploit code.
Other vulnerabilities in Solarwinds Serv-U
Sources
Also known as GHSA-vrh8-5phj-x6h2.