What’s Vulnerable › Vulnerabilities

CVE-2015-2697

• Severity: medium (CVSS 4.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-11-09 · updated 2026-06-17
• Weakness: CWE-125

Description

The build_principal_va function in lib/krb5/krb/bld_princ.c 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 '\0' character in a long realm field within a TGS request.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 15.04, 15.10
• Debian Linux: 7.0, 8.0, 9.0
• MIT Kerberos 5: before 1.14 — fixed in 1.14
• openSUSE Leap: 42.1
• Opensuse: 13.1, 13.2
• Oracle Corporation Solaris Operating System: 11.3
• SUSE Linux Enterprise Server 15 SP1: 12
• SUSE Linux Enterprise Server: 12
• SUSE Linux Enterprise Software Development Kit: 12

How to fix

Upgrade to a fixed version: MIT Kerberos 5 1.14. Check the vendor advisory for mitigations.

References

• 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
• https://github.com/krb5/krb5/commit/f0c094a1b745d91ef2f9a4eae2149aac026a5789
• https://security.gentoo.org/glsa/201611-14
• http://krbdev.mit.edu/rt/Ticket/Display.html?id=8252

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