# CVE-2020-35342: Information disclosure in n/a

> An uninitialized heap vulnerability in GNU Binutils allows attackers to leak sensitive information from memory.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Aug 2023
- **Updated:** 3 Oct 2024
- **Also known as:** CLSA-2025-1761577745, DEBIAN-CVE-2020-35342, GHSA-4j2r-xh73-3xqw, UBUNTU-CVE-2020-35342

## What is CVE-2020-35342?

CVE-2020-35342 is a high-severity vulnerability in Gnu Binutils, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

GNU Binutils before 2.34 has an uninitialized-heap vulnerability in function tic4x_print_cond (file opcodes/tic4x-dis.c) which could allow attackers to make an information leak.

Weakness: CWE-665 (Improper Initialization)

## Which versions are affected by CVE-2020-35342?

It affects 1 product.


Products: Gnu Binutils.

## How do I fix CVE-2020-35342?

Upgrade to a fixed version.

## Is CVE-2020-35342 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-35342 exists.

## Other vulnerabilities in Gnu Binutils

- [CVE-2017-7614](https://insights.sbomify.com/CVE-2017-7614/): Null dereference in n/a (critical 9.8)
- [CVE-2014-9939](https://insights.sbomify.com/CVE-2014-9939/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7226](https://insights.sbomify.com/CVE-2017-7226/): Information disclosure in n/a (critical 9.1)
- [CVE-2017-6969](https://insights.sbomify.com/CVE-2017-6969/): Information disclosure in n/a (critical 9.1)
- [CVE-2020-19726](https://insights.sbomify.com/CVE-2020-19726/): Denial of service in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35342 and fix it if it is affected.

What it is: CVE-2020-35342 is a high-severity vulnerability in Gnu Binutils, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-35342 exists.

Affected product: Gnu Binutils. 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-2020-35342/ (Markdown: https://insights.sbomify.com/CVE-2020-35342/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35342
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35342
- OSV: https://osv.dev/vulnerability/CVE-2020-35342

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35342/
Summaries are generated and may contain mistakes; the official description above is the record.