Input validation error in MIT Kerberos 5

1) Input validation error

EUVDB-ID: #VU41405

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-4345

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote #AU# to execute arbitrary code.

Off-by-one error in the krb5_encode_krbsecretkey function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the LDAP KDB module in kadmind in MIT Kerberos 5 (aka krb5) 1.6.x through 1.11.x before 1.11.6 and 1.12.x before 1.12.2 allows remote authenticated users to cause a denial of service (buffer overflow) or possibly execute arbitrary code via a series of "cpw -keepold" commands.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Kerberos 5: 1.6 - 1.12.1

CPE2.3

• cpe:2.3:a:mit:krb5:1.6:*:*:*:*:*:*:*
• cpe:2.3:a:mit:krb5:1.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:mit:krb5:1.6.2:*:*:*:*:*:*:*

External links

https://advisories.mageia.org/MGASA-2014-0345.html
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
https://krbdev.mit.edu/rt/Ticket/Display.html?id=7980
https://linux.oracle.com/errata/ELSA-2014-1255.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-August/136640.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-August/137056.html
https://lists.opensuse.org/opensuse-security-announce/2014-08/msg00009.html
https://lists.opensuse.org/opensuse-updates/2014-08/msg00030.html
https://rhn.redhat.com/errata/RHSA-2014-1255.html
https://rhn.redhat.com/errata/RHSA-2015-0439.html
https://secunia.com/advisories/59102
https://secunia.com/advisories/59415
https://secunia.com/advisories/59993
https://secunia.com/advisories/60535
https://secunia.com/advisories/60776
https://secunia.com/advisories/61314
https://secunia.com/advisories/61353
https://security.gentoo.org/glsa/glsa-201412-53.xml
https://web.mit.edu/kerberos/advisories/MITKRB5-SA-2014-001.txt
https://www.debian.org/security/2014/dsa-3000
https://www.mandriva.com/security/advisories?name=MDVSA-2014:165
https://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
https://www.osvdb.org/109908
https://www.securityfocus.com/bid/69168
https://www.securitytracker.com/id/1030705
https://blogs.oracle.com/sunsecurity/entry/cve_2014_4345_numeric_errors
https://bugzilla.redhat.com/show_bug.cgi?id=1128157
https://exchange.xforce.ibmcloud.com/vulnerabilities/95212
https://github.com/krb5/krb5/commit/dc7ed55c689d57de7f7408b34631bf06fec9dab1
https://github.com/krb5/krb5/pull/181

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.