Skip to content
Fencer Intel
high 7.5

CVE-2015-3276 json

The nss_parse_ciphers function in libraries/libldap/tls_m.c in OpenLDAP does not properly parse OpenSSL-style multi-keyword mode cipher str…

published 2015-12-07 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3324

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.3%
EPSS 5.3% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The nss_parse_ciphers function in libraries/libldap/tls_m.c in OpenLDAP does not properly parse OpenSSL-style multi-keyword mode cipher strings, which might cause a weaker than intended cipher to be used and allow remote attackers to have unspecified impact via unknown vectors.

Patch / fix

  • openldap openldap 2.5
  • openldap RHEL 7 2.4.40-8.el7
  • openldap-clients RHEL 7 2.4.40-8.el7
  • openldap-servers RHEL 7 2.4.40-8.el7
  • openldap-servers-sql RHEL 7 2.4.40-8.el7

red hat advisories RHSA-2015:2131

  • openldap CBL-Mariner 2.0 2.4.57-5

azure linux advisories AZL-6770

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2015-3276 updated cvss 4.3

openldap: incorrect multi-keyword mode cipherstring parsing

  • Red Hat Enterprise Linux 6 openldap, compat-openldap, openldap-clients, openldap-servers, openldap-servers-sql
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) openldap 2.4.40-8.el7, openldap-clients 2.4.40-8.el7 Red Hat Enterprise Linux Client Optional (v. 7) openldap-servers 2.4.40-8.el7, openldap-servers-sql 2.4.40-8.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openldap 2.4.40-8.el7, openldap-clients 2.4.40-8.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openldap-servers 2.4.40-8.el7, openldap-servers-sql 2.4.40-8.el7 Red Hat Enterprise Linux Server (v. 7) openldap 2.4.40-8.el7, openldap-clients 2.4.40-8.el7, openldap-servers 2.4.40-8.el7 Red Hat Enterprise Linux Server Optional (v. 7) openldap-servers-sql 2.4.40-8.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) openldap 2.4.40-8.el7, openldap-clients 2.4.40-8.el7, openldap-servers 2.4.40-8.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) openldap-servers-sql 2.4.40-8.el7
    fixed: vendor fix RHSA-2015:2131
  • Red Hat Enterprise Linux 5 openldap
    not affected: vulnerable code not present

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

Exploit prediction

5.27% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

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.