Bug 1065274 (CVE-2017-15088)

Summary:	VUL-0: CVE-2017-15088: krb5: Buffer overflow in get_matching_data()
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Alexander Bergmann <abergmann>
Component:	Incidents	Assignee:	Chris Kowalczyk <ckowalczyk>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Major
Priority:	P3 - Medium	CC:	abergmann, meissner, smash_bz
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/194104/
Whiteboard:	CVSSv3:RedHat:CVE-2017-15088:7.1:(AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H) CVSSv2:NVD:CVE-2017-15088:7.5:(AV:N/AC:L/Au:N/C:P/I:P/A:P) CVSSv2:SUSE:CVE-2017-15088:7.1:(AV:N/AC:H/Au:S/C:C/I:C/A:C) CVSSv3:SUSE:CVE-2017-15088:7.5:(AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Alexander Bergmann 2017-10-26 14:22:10 UTC

rh#1504045

A buffer overflow vulnerability was found in get_matching_data() function when both the CA cert and the user cert have a long subject affecting krb5 that includes certauth plugin. Attack requires a validated certificate with a long subject and issuer, and a "pkinit_cert_match" string attribute on some principal in the database. A remote code execution exploit might also require that the attacker gets to choose the contents of the issuer in the validated cert.

Bug report:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1504045
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-15088
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15088

Comment 2 Howard Guo 2017-10-30 15:25:15 UTC

Apart from Teradata's version, SLES 11 is not affected due to its lack of PKINIT infrastructure.

Comment 3 Swamp Workflow Management 2017-11-08 11:17:07 UTC

SUSE-SU-2017:2948-1: An update that fixes one vulnerability is now available.

Category: security (important)
Bug References: 1065274
CVE References: CVE-2017-15088
Sources used:
SUSE Linux Enterprise Software Development Kit 12-SP3 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Software Development Kit 12-SP2 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Server for Raspberry Pi 12-SP2 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Server 12-SP3 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Server 12-SP2 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Desktop 12-SP3 (src):    krb5-1.12.5-40.16.1
SUSE Linux Enterprise Desktop 12-SP2 (src):    krb5-1.12.5-40.16.1
SUSE Container as a Service Platform ALL (src):    krb5-1.12.5-40.16.1
OpenStack Cloud Magnum Orchestration 7 (src):    krb5-1.12.5-40.16.1

Comment 4 Swamp Workflow Management 2017-11-10 17:24:05 UTC

openSUSE-SU-2017:2993-1: An update that fixes one vulnerability is now available.

Category: security (important)
Bug References: 1065274
CVE References: CVE-2017-15088
Sources used:
openSUSE Leap 42.3 (src):    krb5-1.12.5-12.1, krb5-mini-1.12.5-12.1
openSUSE Leap 42.2 (src):    krb5-1.12.5-6.6.1, krb5-mini-1.12.5-6.6.1

Comment 5 Chris Kowalczyk 2018-10-02 11:26:25 UTC

This ticket in my opinion is completed, are you happy with closing this bug, Alexander?

Comment 6 Marcus Meissner 2018-10-02 11:33:15 UTC

done -> closing

Comment 7 Chris Kowalczyk 2018-10-02 11:46:42 UTC

thanks for the quick answer!