Buffer overflow in Kerberos 5 - CVE-2015-8631

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Main Vulnerability Database Vulnerabilities #VU32307

Buffer overflow in Kerberos 5 - CVE-2015-8631

Published: February 13, 2016 / Updated: July 28, 2020


Vulnerability identifier: #VU32307
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-8631
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (memory consumption) via a request specifying a NULL principal name.


Affected software

Kerberos 5
Amazon Linux AMI
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server from RHUI
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - Extended Update Support
Fedora
krb5 (Alpine package)
krb5 (Red Hat package)
krb5

How to mitigate CVE-2015-8631

Install update from vendor's website.

krb5 (Alpine package) - update to 1.12.4-r1
krb5 (Red Hat package) - update to 1.13.2-12.el7_2
krb5 - addressed in versions 1.13.2-13.fc22, 1.14-7.fc23

External References

Related Security Bulletins