openldap: one-byte buffer overflow in slapd
Published Oct 27, 2011
4.0
MEDIUMCVSS 2.0
EPSS 3.27%
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.
Affected products
No data.
- ≤ 2.4.26
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.1
- 1.1.0
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.2
- 1.2.0
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.4
- 1.2.5
- 1.2.6
- 1.2.7
- 1.2.8
- 1.2.9
- 1.2.10
- 1.2.11
- 1.2.12
- 1.2.13
- 2.0
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.0.6
- 2.0.7
- 2.0.8
- 2.0.9
- 2.0.10
- 2.0.11
- 2.0.11_9
- 2.0.11_11
- 2.0.11_11s
- 2.0.12
- 2.0.13
- 2.0.14
- 2.0.15
- 2.0.16
- 2.0.17
- 2.0.18
- 2.0.19
- 2.0.20
- 2.0.21
- 2.0.22
- 2.0.23
- 2.0.24
- 2.0.25
- 2.0.26
- 2.0.27
- 2.1.2
- 2.1.3
- 2.1.4
- 2.1.5
- 2.1.6
- 2.1.7
- 2.1.8
- 2.1.9
- 2.1.10
- 2.1.11
- 2.1.12
- 2.1.13
- 2.1.14
- 2.1.15
- 2.1.16
- 2.1.17
- 2.1.18
- 2.1.19
- 2.1.20
- 2.1.21
- 2.1.22
- 2.1.23
- 2.1.24
- 2.1.25
- 2.1.26
- 2.1.27
- 2.1.28
- 2.1.29
- 2.1.30
- 2.1_.20
- 2.2.0
- 2.2.1
- 2.2.4
- 2.2.5
- 2.2.6
- 2.2.7
- 2.2.8
- 2.2.9
- 2.2.10
- 2.2.11
- 2.2.12
- 2.2.13
- 2.2.14
- 2.2.15
- 2.2.16
- 2.2.17
- 2.2.18
- 2.2.19
- 2.2.20
- 2.2.21
- 2.2.22
- 2.2.23
- 2.2.24
- 2.2.25
- 2.2.26
- 2.2.27
- 2.3.4
- 2.3.5
- 2.3.6
- 2.3.7
- 2.3.8
- 2.3.9
- 2.3.10
- 2.3.11
- 2.3.12
- 2.3.13
- 2.3.14
- 2.3.15
- 2.3.16
- 2.3.17
- 2.3.18
- 2.3.19
- 2.3.20
- 2.3.21
- 2.3.22
- 2.3.23
- 2.3.24
- 2.3.25
- 2.3.26
- 2.3.27
- 2.3.28
- 2.3.29
- 2.3.30
- 2.3.31
- 2.3.32
- 2.3.33
- 2.3.34
- 2.3.35
- 2.3.36
- 2.3.37
- 2.3.38
- 2.3.39
- 2.3.40
- 2.3.41
- 2.3.42
- 2.3.43
- 2.4.3
- 2.4.6
- 2.4.7
- 2.4.8
- 2.4.9
- 2.4.10
- 2.4.11
- 2.4.12
- 2.4.13
- 2.4.14
- 2.4.15
- 2.4.16
- 2.4.17
- 2.4.18
- 2.4.19
- 2.4.20
- 2.4.21
- 2.4.22
- 2.4.23
- 2.4.24
- 2.4.25
No data.
Red Hat Enterprise Linux 4
openldap
Not affected
Red Hat Enterprise Linux 5
openldap
Not affected
Red Hat Enterprise Linux 6
openldap
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | openldap | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openldap | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openldap | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The Red Hat Security Response Team does not consider this to be a security issue. For additional information, refer to: https://bugzilla.redhat.com/show_bug.cgi?id=749324#c1.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.27% (0.03270) | 87.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.71% (0.03713) | 88.30th | v5 (v2026.06.15) |
| Mar 30, 2025 | 6.75% (0.06754) | 90.39th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.74% (0.09740) | 88.14th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.75% (0.06754) | 90.60th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.36% (0.04363) | 92.67th | v3 (v2023.03.01) |
| Jun 16, 2024 | 4.36% (0.04363) | 92.40th | v3 (v2023.03.01) |
| Apr 26, 2024 | 3.95% (0.03952) | 91.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.63% (0.03628) | 90.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (13)
- http://secunia.com/advisories/46599 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://security.gentoo.org/glsa/glsa-201406-36.xml vendor-advisoryx_refsource_GENTOO
- http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9 x_refsource_MISC
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059 x_refsource_MISC
- http://www.openwall.com/lists/oss-security/2011/10/26/5 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2011/10/26/9 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/50384 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1266-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2011-4079 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=749324 x_refsource_MISCPatchIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/70991 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-4079
- https://www.cve.org/CVERecord?id=CVE-2011-4079
Change history (0)
No recorded changes yet.