CVE - CVE-2017-17439

CVE-ID
CVE-2017-17439	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:http://h5l.org/advisories.html?show=2017-12-08 CONFIRM:http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html CONFIRM:https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144 CONFIRM:https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887 CONFIRM:https://github.com/heimdal/heimdal/issues/353 DEBIAN:DSA-4055 URL:https://www.debian.org/security/2017/dsa-4055 MISC:http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html
Assigning CNA
MITRE Corporation
Date Record Created
20171206	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20171206)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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