Buffer overflow in web.mit.edu krb5

1) Buffer overflow

EUVDB-ID: #VU32305

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-8629

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The xdr_nullstring function in lib/kadm5/kadm_rpc_xdr.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 does not verify whether '' characters exist as expected, which allows remote authenticated users to obtain sensitive information or cause a denial of service (out-of-bounds read) via a crafted string.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Kerberos 5: 1.0 - 1.18.2

External links

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8341
http://lists.opensuse.org/opensuse-updates/2016-02/msg00059.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00110.html
http://rhn.redhat.com/errata/RHSA-2016-0493.html
http://rhn.redhat.com/errata/RHSA-2016-0532.html
http://www.debian.org/security/2016/dsa-3466
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/82801
http://www.securitytracker.com/id/1034914
http://github.com/krb5/krb5/commit/df17a1224a3406f57477bcd372c61e04c0e5a5bb

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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