CVE-2021-20274 Null dereference in privoxy
High 7.5
Published
Updated
Check this codebase for CVE-2021-20274 and fix it if it is affected.
What it is: CVE-2021-20274 is a high-severity vulnerability in privoxy, published on 9 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-20274 in the wild and no public exploit code.
Affected product: privoxy. 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-2021-20274/ (Markdown: https://insights.sbomify.com/CVE-2021-20274/index.md)
A NULL-pointer dereference in Privoxy allows a malicious SOCKS server to crash the proxy, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-20274?
CVE-2021-20274 is a high-severity vulnerability in privoxy, published on 9 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in privoxy before 3.0.32. A crash may occur due a NULL-pointer dereference when the socks server misbehaves.
Weakness: CWE-476
Which versions are affected by CVE-2021-20274?
It affects 1 product.
Products include Privoxy Privoxy.
How do I fix CVE-2021-20274?
Upgrade to a fixed version.
Is CVE-2021-20274 being exploited?
There is no known exploitation of CVE-2021-20274 in the wild and no public exploit code.
Other vulnerabilities in privoxy
Sources
Also known as ALPINE-CVE-2021-20274, DEBIAN-CVE-2021-20274, GHSA-g899-mr4g-v86j.