Upstream information

CVE-2017-17439 at MITRE

Description

In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
	National Vulnerability Database
Base Score	5
Vector	AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector	Network
Access Complexity	Low
Authentication	None
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	Partial

CVSS v3 Scores
	National Vulnerability Database
Base Score	7.5
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	High
CVSSv3 Version	3

SUSE Bugzilla entry: 1071675 [RESOLVED / FIXED]

SUSE Security Advisories:

openSUSE-SU-2018:2376-1, published Fri Dec 8 15:48:40 2023

List of released packages

Product(s)	Fixed package version(s)	References
openSUSE Tumbleweed	`libheimdal >= 7.7.0-1.11` `libheimdal-devel >= 7.7.0-1.11`	Patchnames: openSUSE-Tumbleweed-2024-10946

SUSE Timeline for this CVE

CVE page created: Wed Dec 6 20:25:07 2017
CVE page last modified: Sat Jun 15 23:48:38 2024