# CVE-2013-0242: Memory corruption in n/a

> A buffer overflow in glibc's regex matcher allows attackers to cause a denial of service via crafted multibyte characters.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Feb 2013
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2013-0242, GHSA-f776-wjgx-67c8

## What is CVE-2013-0242?

CVE-2013-0242 is a medium-severity memory corruption vulnerability in Gnu Glibc, published on 8 Feb 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in the extend_buffers function in the regular expression matcher (posix/regexec.c) in glibc, possibly 2.17 and earlier, allows context-dependent attackers to cause a denial of service (memory corruption and crash) via crafted multibyte characters.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2013-0242?

It affects 1 product.


Products: Gnu Glibc.

## How do I fix CVE-2013-0242?

Upgrade to a fixed version.

## Is CVE-2013-0242 being exploited?

There is no known exploitation of CVE-2013-0242 in the wild and no public exploit code.

## Other vulnerabilities in Gnu Glibc

- [CVE-2026-5450](https://insights.sbomify.com/CVE-2026-5450/): scanf %mc off-by-one heap buffer overflow (critical 9.8)
- [CVE-2023-25139](https://insights.sbomify.com/CVE-2023-25139/): Memory corruption in n/a (critical 9.8)
- [CVE-1999-0199](https://insights.sbomify.com/CVE-1999-0199/): Other in n/a (critical 9.8)
- [CVE-2019-1010022](https://insights.sbomify.com/CVE-2019-1010022/): Security feature bypass in glibc (critical 9.8)
- [CVE-2005-3590](https://insights.sbomify.com/CVE-2005-3590/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-0242 and fix it if it is affected.

What it is: CVE-2013-0242 is a medium-severity memory corruption vulnerability in Gnu Glibc, published on 8 Feb 2013. 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-2013-0242 in the wild and no public exploit code.

Affected product: Gnu Glibc. 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-2013-0242/ (Markdown: https://insights.sbomify.com/CVE-2013-0242/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-0242
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-0242
- OSV: https://osv.dev/vulnerability/CVE-2013-0242

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-0242/
Summaries are generated and may contain mistakes; the official description above is the record.