# CVE-2005-1935: Memory corruption in n/a

> Remote attackers can execute arbitrary code via a heap-based buffer overflow in the Microsoft ASN.1 library during HTTP authentication.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2005
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-7wp6-vjqc-vxjv

## What is CVE-2005-1935?

CVE-2005-1935 is a high-severity memory corruption vulnerability in Microsoft Windows 2000, published on 9 Jun 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818.  NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.

## Which versions are affected by CVE-2005-1935?

It affects 4 products.


Products: Microsoft Windows 2000, Microsoft Windows 2003 Server, Microsoft Windows Nt, Microsoft Windows Xp.

## How do I fix CVE-2005-1935?

No fix has been published for CVE-2005-1935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2005-1935 being exploited?

There is no known exploitation of CVE-2005-1935 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows 2000

- [CVE-2008-4250](https://insights.sbomify.com/CVE-2008-4250/): Microsoft Windows Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2010-0232](https://insights.sbomify.com/CVE-2010-0232/): Microsoft Windows Kernel Exception Handler (high 7.8, exploited in the wild)
- [CVE-2009-1123](https://insights.sbomify.com/CVE-2009-1123/): Microsoft Windows Improper Input Validation (high 7.8, exploited in the wild)
- [CVE-2002-0367](https://insights.sbomify.com/CVE-2002-0367/): Microsoft Windows Privilege Escalation (high 7.8, exploited in the wild)
- [CVE-2010-0269](https://insights.sbomify.com/CVE-2010-0269/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2005-1935 and fix it if it is affected.

What it is: CVE-2005-1935 is a high-severity memory corruption vulnerability in Microsoft Windows 2000, published on 9 Jun 2005. 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-2005-1935 in the wild and no public exploit code.

Affected product: Microsoft Windows 2000. 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-2005-1935/ (Markdown: https://insights.sbomify.com/CVE-2005-1935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2005-1935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2005-1935
- OSV: https://osv.dev/vulnerability/CVE-2005-1935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2005-1935/
Summaries are generated and may contain mistakes; the official description above is the record.