# CVE-2019-15693: Memory corruption in TigerVNC

> A heap buffer overflow in TigerVNC allows remote attackers to execute arbitrary code via network connectivity.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-15693, GHSA-xv8c-xf4m-4698, UBUNTU-CVE-2019-15693

## What is CVE-2019-15693?

CVE-2019-15693 is a high-severity memory corruption vulnerability in Kaspersky TigerVNC, published on 26 Dec 2019. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2019-15693?

It affects 1 product.


Products: Tigervnc Tigervnc.

## How do I fix CVE-2019-15693?

Upgrade to a fixed version.

## Is CVE-2019-15693 being exploited?

There is no known exploitation of CVE-2019-15693 in the wild and no public exploit code.

## Other vulnerabilities in Kaspersky TigerVNC

- [CVE-2014-0011](https://insights.sbomify.com/CVE-2014-0011/): Memory corruption in TigerVNC (critical 9.8)
- [CVE-2017-5581](https://insights.sbomify.com/CVE-2017-5581/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7393](https://insights.sbomify.com/CVE-2017-7393/): Use after free in n/a (high 8.8)
- [CVE-2026-34352](https://insights.sbomify.com/CVE-2026-34352/): Missing authorization in TigerVNC (high 8.5)
- [CVE-2017-7392](https://insights.sbomify.com/CVE-2017-7392/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15693 and fix it if it is affected.

What it is: CVE-2019-15693 is a high-severity memory corruption vulnerability in Kaspersky TigerVNC, published on 26 Dec 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-15693 in the wild and no public exploit code.

Affected product: Kaspersky TigerVNC. 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-2019-15693/ (Markdown: https://insights.sbomify.com/CVE-2019-15693/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15693
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15693
- OSV: https://osv.dev/vulnerability/CVE-2019-15693

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15693/
Summaries are generated and may contain mistakes; the official description above is the record.