Input validation error in Kerberos 5 - CVE-2015-2695

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Main Vulnerability Database Vulnerabilities #VU33818

Input validation error in Kerberos 5 - CVE-2015-2695

Published: November 9, 2015 / Updated: August 4, 2020


Vulnerability identifier: #VU33818
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2015-2695
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read and process crash) via a crafted SPNEGO packet that is mishandled during a gss_inquire_context call.


Affected software

Kerberos 5
IBM DataPower Gateway
Gentoo Linux
SUSE Linux
Fedora
Opensuse
krb5 (Alpine package)
krb5

How to mitigate CVE-2015-2695

Install update from vendor's website.

krb5 (Alpine package) - update to 1.12.1-r2
IBM DataPower Gateway - addressed in versions 10.0.1.5, 10.0.4.0, 2018.4.1.18
krb5 - addressed in versions 1.12.2-18.fc21, 1.12.2-19.fc21, 1.13.2-9.fc22, 1.13.2-10.fc22, 1.13.2-12.fc23

External References

Related Security Bulletins