CVE-2017-17439

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…

published December 6, 2017

CVSS
—
EPSS
3%
Percentile
88.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.03427 · 88.8th percentile
Published
2017-12-06T15:00Z
EPSS history
Timeline
  • 06 DEC 15:00Z
    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…
    cvelistv5