CVE-2013-4496

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-03-14 · updated 2026-06-16
Weakness: CWE-255

Description

Samba 3.x before 3.6.23, 4.0.x before 4.0.16, and 4.1.x before 4.1.6 does not enforce the password-guessing protection mechanism for all interfaces, which makes it easier for remote attackers to obtain access via brute-force ChangePasswordUser2 (1) SAMR or (2) RAP attempts.

Affected products

Canonical Ubuntu Linux: 10.04, 12.04, 12.10, 13.10
Samba: from 3.4.0 before 3.6.23; from 4.0.0 before 4.0.16; from 4.1.0 before 4.1.6 — fixed in 3.6.23, 4.0.16, 4.1.6

How to fix

Upgrade to a fixed version: Samba 3.6.23, 4.0.16, 4.1.6. Check the vendor advisory for mitigations.

References

http://advisories.mageia.org/MGASA-2014-0138.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
http://lists.opensuse.org/opensuse-updates/2014-03/msg00062.html
http://lists.opensuse.org/opensuse-updates/2014-03/msg00063.html
http://rhn.redhat.com/errata/RHSA-2014-0330.html
http://security.gentoo.org/glsa/glsa-201502-15.xml
http://www.mandriva.com/security/advisories?name=MDVSA-2015:082
http://www.samba.org/samba/history/samba-3.6.23.html
http://www.samba.org/samba/history/samba-4.0.16.html

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