Buffer overflow in the krbv4_ldap_auth function in servers/slapd/kerberos.c in OpenLDAP 2.4.3 and earlier, when OpenLDAP is compiled with the --enable-kbind (Kerberos KBIND) option, allows remote attackers to execute arbitrary code via an LDAP bind request using the LDAP_AUTH_KRBV41 authentication method and long credential data
Published Dec 13, 2006
5.1
MEDIUMCVSS 2.0
EPSS 9.33%
Description
Buffer overflow in the krbv4_ldap_auth function in servers/slapd/kerberos.c in OpenLDAP 2.4.3 and earlier, when OpenLDAP is compiled with the --enable-kbind (Kerberos KBIND) option, allows remote attackers to execute arbitrary code via an LDAP bind request using the LDAP_AUTH_KRBV41 authentication method and long credential data.
Affected products
No data.
- ≤ 2.4.3
- 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
- 2.2.28_r2
- 2.3.27_2_2006-10-18
- 2.3.28_2_2006-10-22
- 2.3.28_2006-10-22
- 2.3.28_e1.0.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. OpenLDAP as shipped with Red Hat Enterprise Linux 2.1, 3, and 4 does not support the LDAP_AUTH_KRBV41 authentication method.
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:H/Au:N/C:P/I:P/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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 9.33% (0.09326) | 95.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.19% (0.09192) | 94.66th | v5 (v2026.06.15) |
| Aug 7, 2025 | 8.43% (0.08429) | 91.94th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.66% (0.02655) | 84.46th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.32% (0.04325) | 81.15th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.66% (0.02655) | 84.78th | v4 (v2025.03.14) |
| Dec 17, 2024 | 15.13% (0.15133) | 95.82th | v3 (v2023.03.01) |
| Aug 18, 2024 | 11.78% (0.11783) | 95.40th | v3 (v2023.03.01) |
| Mar 18, 2024 | 10.78% (0.10779) | 94.95th | v3 (v2023.03.01) |
| Sep 8, 2023 | 9.74% (0.09736) | 94.07th | v3 (v2023.03.01) |
| Aug 1, 2023 | 9.41% (0.09406) | 93.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 9.60% (0.09598) | 93.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.69% (0.07687) | 93.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.69% (0.07687) | 92.39th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.69% (0.07687) | 81.34th | v2 (v2022.01.01) |
No CWE recorded.
References (8)
- http://secunia.com/advisories/23334 third-party-advisoryx_refsource_SECUNIA
- http://securityreason.com/securityalert/2023 third-party-advisoryx_refsource_SREASON
- http://www.phreedom.org/solar/exploits/openldap-kbind x_refsource_MISCExploit
- http://www.securityfocus.com/archive/1/454181/30/0/threaded mailing-listx_refsource_BUGTRAQExploitVendor Advisory
- http://www.vupen.com/english/advisories/2006/4964 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2006-6493 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2006-6493
- https://www.cve.org/CVERecord?id=CVE-2006-6493
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/23334 | third-party-advisoryx_refsource_SECUNIA | |
| http://securityreason.com/securityalert/2023 | third-party-advisoryx_refsource_SREASON | |
| http://www.phreedom.org/solar/exploits/openldap-kbind | x_refsource_MISCExploit | |
| http://www.securityfocus.com/archive/1/454181/30/0/threaded | mailing-listx_refsource_BUGTRAQExploitVendor Advisory | |
| http://www.vupen.com/english/advisories/2006/4964 | vdb-entryx_refsource_VUPEN | |
| https://access.redhat.com/security/cve/CVE-2006-6493 | Vendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2006-6493 | ||
| https://www.cve.org/CVERecord?id=CVE-2006-6493 |
Change history (0)
No recorded changes yet.