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CVE-2011-4079
Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service…
Medium4.0EPSS 3.3%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.
Timeline
ID reserved
By redhat
- 9 days later
· 9 days later
Published
- 13 years later
· 13 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 3.3% · top 12% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.0.
Weakness
Affected products
n/a
- affected n/a
References (10)
- GLSA-201406-36 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- [oss-security] 20111026 CVE Request: openldap2 UTF8StringNormalize() can cause a (one-byte) buffer overflow (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059 (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=749324 (opens in a new tab)x_refsource_MISCx_transferred
- USN-1266-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 46599 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9 (opens in a new tab)x_refsource_MISCx_transferred
- 50384 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- openldap-utf8stringnormalize-dos(70991) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- [oss-security] 20111026 Re: CVE Request: openldap2 UTF8StringNormalize() can cause a (one-byte) buffer overflow (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2011-4079)Record last updated .