SB2015111302 - Buffer overflow in MIT Kerberos 5

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2015-2698)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 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/E:U/U:Green

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.

Remediation

Install update from vendor's website.

References

• http://krbdev.mit.edu/rt/Ticket/Display.html?id=8273
• http://lists.opensuse.org/opensuse-updates/2015-11/msg00116.html
• http://lists.opensuse.org/opensuse-updates/2015-12/msg00124.html
• http://www.ubuntu.com/usn/USN-2810-1
• https://github.com/krb5/krb5/commit/3db8dfec1ef50ddd78d6ba9503185995876a39fd