Buffer overflow in Kerberos 5 - CVE-2015-2698
Published: November 13, 2015 / Updated: August 4, 2020
Vulnerability identifier: #VU33639
CSH Severity: Medium
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-2698
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote #AU# to execute arbitrary code.
The iakerb_gss_export_sec_context function in lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) 1.14 pre-release 2015-09-14 improperly accesses a certain pointer, which allows remote authenticated users to cause a denial of service (memory corruption) or possibly have unspecified other impact by interacting with an application that calls the gss_export_sec_context function. NOTE: this vulnerability exists because of an incorrect fix for CVE-2015-2696.
Affected software
Kerberos 5
krb5 (Alpine package)
krb5
Fedora
krb5 (Alpine package)
krb5
Fedora
How to mitigate CVE-2015-2698
Install update from vendor's website.
krb5 (Alpine package) - update to 1.12.4-r0
krb5 - addressed in versions 1.12.2-19.fc21, 1.13.2-10.fc22, 1.13.2-13.fc23
krb5 - addressed in versions 1.12.2-19.fc21, 1.13.2-10.fc22, 1.13.2-13.fc23