# CVE-2011-1553: Use after free in n/a

> Remote attackers can cause a denial of service via a crafted PDF document exploiting a use-after-free flaw in the t1lib library.

- **Severity:** Medium 4.3 (`AV:N/AC:M/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 31 Mar 2011
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2011-1553, GHSA-6xpf-26gh-gvp9

## What is CVE-2011-1553?

CVE-2011-1553 is a medium-severity use after free vulnerability in Glyphandcog Xpdfreader, published on 31 Mar 2011. 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

Use-after-free vulnerability in t1lib 5.1.2 and earlier, as used in Xpdf before 3.02pl6, teTeX, and other products, allows remote attackers to cause a denial of service (application crash) via a PDF document containing a crafted Type 1 font that triggers an invalid memory write, a different vulnerability than CVE-2011-0764.

Weakness: CWE-399

## Which versions are affected by CVE-2011-1553?

It affects 3 products.


Products: Foolabs Xpdf, Glyphandcog Xpdfreader, T1lib T1lib.

## How do I fix CVE-2011-1553?

Upgrade to a fixed version.

## Is CVE-2011-1553 being exploited?

There is no known exploitation of CVE-2011-1553 in the wild and no public exploit code.

## Other vulnerabilities in Glyphandcog Xpdfreader

- [CVE-2009-0165](https://insights.sbomify.com/CVE-2009-0165/): Integer overflow in n/a (critical 10.0)
- [CVE-2009-3603](https://insights.sbomify.com/CVE-2009-3603/): Integer overflow in n/a (critical 9.3)
- [CVE-2009-3604](https://insights.sbomify.com/CVE-2009-3604/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-3606](https://insights.sbomify.com/CVE-2009-3606/): Integer overflow in n/a (critical 9.3)
- [CVE-2009-3608](https://insights.sbomify.com/CVE-2009-3608/): Integer overflow in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1553 and fix it if it is affected.

What it is: CVE-2011-1553 is a medium-severity use after free vulnerability in Glyphandcog Xpdfreader, published on 31 Mar 2011. 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-2011-1553 in the wild and no public exploit code.

Affected product: Glyphandcog Xpdfreader. 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-2011-1553/ (Markdown: https://insights.sbomify.com/CVE-2011-1553/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1553
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1553
- OSV: https://osv.dev/vulnerability/CVE-2011-1553

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1553/
Summaries are generated and may contain mistakes; the official description above is the record.