The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows…
Priority MEDIUM 41CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Partial Red Hat: 19 fixed, 1 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows remote attackers to cause a denial of service (reachable assertion and application crash) via crafted BER data, as demonstrated by an attack against slapd.
Why it matters now
EPSS 0.18823 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 19 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2015:1840 Released 2015-09-29 · Red Hat rating Importantopenldap security update
- Red Hat Enterprise Linux (v. 5 server) compat-openldap-2.3.43_2.2.29-29.el5_11, compat-openldap-2.3.43_2.2.29-29.el5_11.i386, compat-openldap-2.3.43_2.2.29-29.el5_11.ia64 +25
- Red Hat Enterprise Linux Client (v. 7) openldap-2.4.39-7.el7_1, openldap-clients-2.4.39-7.el7_1
- Red Hat Enterprise Linux Client Optional (v. 7) openldap-devel-2.4.39-7.el7_1, openldap-servers-2.4.39-7.el7_1, openldap-servers-sql-2.4.39-7.el7_1
- Red Hat Enterprise Linux ComputeNode (v. 7) openldap-2.4.39-7.el7_1, openldap-clients-2.4.39-7.el7_1
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) openldap-devel-2.4.39-7.el7_1, openldap-servers-2.4.39-7.el7_1, openldap-servers-sql-2.4.39-7.el7_1
- Red Hat Enterprise Linux Desktop (v. 5 client) compat-openldap-2.3.43_2.2.29-29.el5_11, compat-openldap-2.3.43_2.2.29-29.el5_11.i386, openldap-2.3.43-29.el5_11 +3
- Red Hat Enterprise Linux Desktop (v. 6) openldap-2.4.40-6.el6_7, openldap-clients-2.4.40-6.el6_7
- Red Hat Enterprise Linux Desktop Optional (v. 6) openldap-devel-2.4.40-6.el6_7, openldap-servers-2.4.40-6.el6_7, openldap-servers-sql-2.4.40-6.el6_7
- Red Hat Enterprise Linux Desktop Workstation (v. 5 client) openldap-2.3.43-29.el5_11, openldap-devel-2.3.43-29.el5_11, openldap-devel-2.3.43-29.el5_11.i386 +6
- Red Hat Enterprise Linux HPC Node (v. 6) openldap-2.4.40-6.el6_7, openldap-clients-2.4.40-6.el6_7
- Red Hat Enterprise Linux HPC Node Optional (v. 6) openldap-devel-2.4.40-6.el6_7, openldap-servers-2.4.40-6.el6_7, openldap-servers-sql-2.4.40-6.el6_7
- Red Hat Enterprise Linux Server (v. 6) openldap-2.4.40-6.el6_7, openldap-2.4.40-6.el6_7.ppc, openldap-clients-2.4.40-6.el6_7 +3
- Red Hat Enterprise Linux Server (v. 7) openldap-2.4.39-7.ael7b_1, openldap-2.4.39-7.el7_1, openldap-2.4.39-7.el7_1.ppc +7
- Red Hat Enterprise Linux Server Optional (v. 6) openldap-servers-sql-2.4.40-6.el6_7
- Red Hat Enterprise Linux Server Optional (v. 7) openldap-servers-sql-2.4.39-7.ael7b_1, openldap-servers-sql-2.4.39-7.el7_1
- Red Hat Enterprise Linux Workstation (v. 6) openldap-2.4.40-6.el6_7, openldap-clients-2.4.40-6.el6_7, openldap-devel-2.4.40-6.el6_7 +1
- Red Hat Enterprise Linux Workstation (v. 7) openldap-2.4.39-7.el7_1, openldap-clients-2.4.39-7.el7_1, openldap-devel-2.4.39-7.el7_1 +1
- Red Hat Enterprise Linux Workstation Optional (v. 6) openldap-servers-sql-2.4.40-6.el6_7
- Red Hat Enterprise Linux Workstation Optional (v. 7) openldap-servers-sql-2.4.39-7.el7_1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 4 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Desktop Workstation (v. 5 client) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2015:1840 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:1840 |
Timeline
- 2026-10-02 Threatist record created from CVE-2015-6908
- 2026-10-03 Alias added: GHSA-436x-9fhf-jq78
References
Advisory 9
Other 5
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.security-assessment.com/files/documents/advisory/OpenLDAP-ber_get_next-Denial-of-Service.pdf
- https://support.apple.com/HT205637
- http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commit%3Bh=6fe51a9ab04fd28bbc171da3cf12f1c1040d6629
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Sources
- CVE-2015-6908 · CVE Program
- CVE-2015-6908 · NVD
- FIRST EPSS
- GHSA-436x-9fhf-jq78 · GitHub Advisory Database · CC BY 4.0
- CVE-2015-6908 · Red Hat security data · CC BY 4.0
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