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Fencer Intel
medium 5.0

CVE-2015-6908 json

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 (re…

published 2015-09-11 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-6844

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
18.8%
EPSS 18.8% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

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.

Patch / fix

  • openldap Debian 14, Debian 13, Debian 12 2.4.42+dfsg-2

debian advisories DEBIAN-CVE-2015-6908

  • openldap Ubuntu 14.04 LTS 2.4.31-1+nmu2ubuntu8.2

ubuntu advisories UBUNTU-CVE-2015-6908

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openldap RHEL 5 2.3.43-29.el5_11
  • openldap RHEL 6 2.4.40-6.el6_7
  • openldap RHEL 7 2.4.39-7.el7_1
  • openldap RHEL 7 2.4.39-7.ael7b_1
  • compat-openldap RHEL 5 2.3.43_2.2.29-29.el5_11
  • openldap-clients RHEL 5 2.3.43-29.el5_11
  • openldap-clients RHEL 6 2.4.40-6.el6_7
  • openldap-clients RHEL 7 2.4.39-7.el7_1

red hat advisories RHSA-2015:1840

  • openldap2-client Studio Onsite 1.3 2.4.26-0.17.23.1
  • openldap2 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +4 more 2.4.41-18.13.4
  • openldap2-client SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 2.4.41-18.13.1
  • openldap2 SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +4 more 2.4.26-0.62.2
  • openldap2-client SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 2.4.26-0.62.2
  • openldap2-client-openssl1 SLES 11-SECURITY 2.4.26-0.62.3

suse advisories SUSE-SU-2016:0262-1SUSE-SU-2016:0224-1SUSE-SU-2016:0090-1

  • openldap2 openSUSE Tumbleweed 1.2-22.1

opensuse advisories openSUSE-SU-2024:10012-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-6908 updated cvss 5.0

openldap: ber_get_next denial of service vulnerability

  • Red Hat Enterprise Linux 4 openldap
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) openldap 2.3.43-29.el5_11, openldap-clients 2.3.43-29.el5_11, openldap-servers 2.3.43-29.el5_11, openldap-servers-sql 2.3.43-29.el5_11, compat-openldap 2.3.43_2.2.29-29.el5_11, openldap-servers-overlays 2.3.43-29.el5_11 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-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-servers 2.4.39-7.el7_1, openldap-servers-sql 2.4.39-7.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) openldap 2.3.43-29.el5_11, openldap-clients 2.3.43-29.el5_11, compat-openldap 2.3.43_2.2.29-29.el5_11
    +13 more products
    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-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-servers 2.3.43-29.el5_11, openldap-servers-sql 2.3.43-29.el5_11, openldap-servers-overlays 2.3.43-29.el5_11 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-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-clients 2.4.40-6.el6_7, openldap-servers 2.4.40-6.el6_7 Red Hat Enterprise Linux Server (v. 7) openldap 2.4.39-7.el7_1, openldap 2.4.39-7.ael7b_1, openldap-clients 2.4.39-7.el7_1, openldap-servers 2.4.39-7.el7_1, openldap-clients 2.4.39-7.ael7b_1, openldap-servers 2.4.39-7.ael7b_1 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.el7_1, openldap-servers-sql 2.4.39-7.ael7b_1 Red Hat Enterprise Linux Workstation (v. 6) openldap 2.4.40-6.el6_7, openldap-clients 2.4.40-6.el6_7, openldap-servers 2.4.40-6.el6_7 Red Hat Enterprise Linux Workstation (v. 7) openldap 2.4.39-7.el7_1, openldap-clients 2.4.39-7.el7_1, openldap-servers 2.4.39-7.el7_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
    fixed: vendor fix RHSA-2015:1840

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-38145)
  2. Published

Exploit prediction

18.82% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-38145 OpenLDAP 2.4.42 - ber_get_next Denial of Service dos, 2015-09-11
  • openldap.org http://www.openldap.org/its/index.cgi/Software%20Bugs?id=8240 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.