CVE-2015-2697 Denial of service in n/a

What is CVE-2015-2697?

CVE-2015-2697 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 9 Nov 2015. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2015-2697?

It affects 9 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Mit Kerberos 5, Opensuse Leap, Opensuse Opensuse, Oracle Solaris and 3 more.

How do I fix CVE-2015-2697?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-2697 being exploited?

There is no known exploitation of CVE-2015-2697 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-2697, DSA-3395-2, GHSA-rw46-7hq3-wqv6, UBUNTU-CVE-2015-2697.