Buffer overflow in Kerberos 5 - CVE-2015-8629

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Main Vulnerability Database Vulnerabilities #VU32305

Buffer overflow in Kerberos 5 - CVE-2015-8629

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


Vulnerability identifier: #VU32305
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-8629
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The xdr_nullstring function in lib/kadm5/kadm_rpc_xdr.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 does not verify whether '' characters exist as expected, which allows remote authenticated users to obtain sensitive information or cause a denial of service (out-of-bounds read) via a crafted string.


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-2015-8629

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