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Fencer Intel
medium 6.5

CVE-2015-8631 json

Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow…

published 10y ago modified 4mo ago also EUVD-2015-8508

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (memory consumption) via a request specifying a NULL principal name.

Patch / fix

  • mit kerberos_5 1.13.4, 1.14.1
  • krb5 Debian 14, Debian 13, Debian 12 1.13.2+dfsg-5

debian advisories DEBIAN-CVE-2015-8631

  • krb5 Ubuntu 14.04 LTS 1.12+dfsg-2ubuntu5.4

ubuntu advisories UBUNTU-CVE-2015-8631

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

  • krb5 RHEL 6 1.10.3-42z1.el6_7
  • krb5-libs RHEL 6 1.10.3-42z1.el6_7
  • krb5-server RHEL 6 1.10.3-42z1.el6_7
  • krb5-server-ldap RHEL 6 1.10.3-42z1.el6_7
  • krb5-workstation RHEL 6 1.10.3-42z1.el6_7
  • krb5-pkinit-openssl RHEL 6 1.10.3-42z1.el6_7
  • krb5 RHEL 7 1.13.2-12.el7_2
  • krb5-libs RHEL 7 1.13.2-12.el7_2

red hat advisories RHSA-2016:0493RHSA-2016:0532

  • krb5 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 1.12.1-25.1
  • krb5 SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 +1 more 1.6.3-133.49.106.1

suse advisories SUSE-SU-2016:0429-1SUSE-SU-2016:0430-1

  • krb5 openSUSE Tumbleweed 1.15-1.1

opensuse advisories openSUSE-SU-2024:10004-1

  • krb5 Alpine 3.4 1.14-r1

alpine advisories ALPINE-CVE-2015-8631

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2015-8631 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2015-8631 updated cvss 4.0

krb5: Memory leak caused by supplying a null principal name in request

  • Red Hat Enterprise Linux 5 krb5
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) krb5 1.13.2-12.el7_2, krb5-libs 1.13.2-12.el7_2, krb5-pkinit 1.13.2-12.el7_2, krb5-workstation 1.13.2-12.el7_2 Red Hat Enterprise Linux Client Optional (v. 7) krb5-server 1.13.2-12.el7_2, krb5-server-ldap 1.13.2-12.el7_2 Red Hat Enterprise Linux ComputeNode (v. 7) krb5 1.13.2-12.el7_2, krb5-libs 1.13.2-12.el7_2, krb5-pkinit 1.13.2-12.el7_2, krb5-workstation 1.13.2-12.el7_2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) krb5-server 1.13.2-12.el7_2, krb5-server-ldap 1.13.2-12.el7_2
    fixed: vendor fix RHSA-2016:0532
  • Red Hat Enterprise Linux Desktop (v. 6) krb5 1.10.3-42z1.el6_7, krb5-libs 1.10.3-42z1.el6_7, krb5-workstation 1.10.3-42z1.el6_7, krb5-pkinit-openssl 1.10.3-42z1.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) krb5-server 1.10.3-42z1.el6_7, krb5-server-ldap 1.10.3-42z1.el6_7 Red Hat Enterprise Linux HPC Node (v. 6) krb5 1.10.3-42z1.el6_7, krb5-libs 1.10.3-42z1.el6_7, krb5-workstation 1.10.3-42z1.el6_7, krb5-pkinit-openssl 1.10.3-42z1.el6_7 Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5-server 1.10.3-42z1.el6_7, krb5-server-ldap 1.10.3-42z1.el6_7 Red Hat Enterprise Linux Server (v. 6) krb5 1.10.3-42z1.el6_7, krb5-libs 1.10.3-42z1.el6_7, krb5-server 1.10.3-42z1.el6_7, krb5-server-ldap 1.10.3-42z1.el6_7, krb5-workstation 1.10.3-42z1.el6_7, krb5-pkinit-openssl 1.10.3-42z1.el6_7
    fixed: vendor fix RHSA-2016:0493
  • Red Hat Enterprise Linux Server (v. 7) krb5 1.13.2-12.el7_2, krb5-libs 1.13.2-12.el7_2, krb5-pkinit 1.13.2-12.el7_2, krb5-server 1.13.2-12.el7_2, krb5-server-ldap 1.13.2-12.el7_2, krb5-workstation 1.13.2-12.el7_2
    fixed: vendor fix RHSA-2016:0532
  • Red Hat Enterprise Linux Workstation (v. 6) krb5 1.10.3-42z1.el6_7, krb5-libs 1.10.3-42z1.el6_7, krb5-server 1.10.3-42z1.el6_7, krb5-server-ldap 1.10.3-42z1.el6_7, krb5-workstation 1.10.3-42z1.el6_7, krb5-pkinit-openssl 1.10.3-42z1.el6_7
    fixed: vendor fix RHSA-2016:0493
  • Red Hat Enterprise Linux Workstation (v. 7) krb5 1.13.2-12.el7_2, krb5-libs 1.13.2-12.el7_2, krb5-pkinit 1.13.2-12.el7_2, krb5-server 1.13.2-12.el7_2, krb5-server-ldap 1.13.2-12.el7_2, krb5-workstation 1.13.2-12.el7_2
    fixed: vendor fix RHSA-2016:0532
  • Red Hat JBoss Enterprise Web Server 2 krb5
    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

4.68% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness
  • CWE-772 Missing Release of Resource after Effective Lifetime

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.