NULL pointer dereference in web.mit.edu krb5

1) NULL pointer dereference

EUVDB-ID: #VU32306

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8630

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by specifying KADM5_POLICY with a NULL policy name. <a href="http://cwe.mitre.org/data/definitions/476. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Kerberos 5: 1.0 - 1.18.2

CPE2.3

• cpe:2.3:a:mit:krb5:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mit:krb5:1.11.2:*:*:*:*:*:*:*
• cpe:2.3:a:mit:krb5:1.13.6:*:*:*:*:*:*:*

External links

https://krbdev.mit.edu/rt/Ticket/Display.html?id=8342
https://lists.opensuse.org/opensuse-updates/2016-02/msg00059.html
https://lists.opensuse.org/opensuse-updates/2016-02/msg00110.html
https://rhn.redhat.com/errata/RHSA-2016-0532.html
https://www.debian.org/security/2016/dsa-3466
https://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://www.securitytracker.com/id/1034915
https://github.com/krb5/krb5/commit/b863de7fbf080b15e347a736fdda0a82d42f4f6b

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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