Out-of-bounds read in web.mit.edu krb5

1) Out-of-bounds read

EUVDB-ID: #VU32373

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:N/AC:L/PR:/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2015-2697

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the lib/krb5/krb/bld_princ.c function in MIT Kerberos 5 (aka krb5) before 1.14 allows remote authenticated users to cause a denial of service (out-of-bounds read and KDC crash) via an initial '' character file. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and crash the affected application.

Mitigation

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

Vulnerable software versions

Kerberos 5: 1.0 - 1.18.2

External links

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8252
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00022.html
http://www.debian.org/security/2015/dsa-3395
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securityfocus.com/bid/77581
http://www.securitytracker.com/id/1034084
http://www.ubuntu.com/usn/USN-2810-1
http://github.com/krb5/krb5/commit/f0c094a1b745d91ef2f9a4eae2149aac026a5789
http://security.gentoo.org/glsa/201611-14

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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