VDB
CVE-2017-17439
CVE-2017-17439
REJECTED
CVSS 7.5 HIGH
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.
EPSS 3.43% · 88.5th percentile
Risk Scores
CVSS 3.0
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
3.43%
88.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | heimdal | 0, * |
Timeline
- Dec 6, 2017 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 27, 2021 EPSS Score
- Dec 29, 2021 EPSS Score
- Mar 2, 2022 EPSS Score
- May 4, 2022 EPSS Score
- Jul 6, 2022 EPSS Score
- Nov 10, 2022 EPSS Score
- Jan 12, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Apr 29, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2017-17439 third-party-advisory
- http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2017-17439 third-party-advisory