CVE-2017-17439
HIGH
7,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
MEDIUM
5,0
Source: [email protected]
Access Vector: network
Access Complexity: low
Authentication: none
Confidentiality: none
Integrity: none
Availability: partial
Description
AI Translation Available
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 (Exploit Prediction Scoring System)
Trend Analysis
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score
0,0918
Percentile
0,9th
Updated
EPSS Score Trend (Last 90 Days)
476
NULL Pointer Dereference
StableCommon Consequences
Security Scopes Affected:
Availability
Integrity
Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart
Execute Unauthorized Code Or Commands
Read Memory
Modify Memory
Applicable Platforms
Languages:
C, C#, C++, Go, Java
Application
Heimdal by Heimdal Project
Version Range Affected
To
7.4.0
(inclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Debian Linux by Debian
CPE Identifier
View Detailed Analysis
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
http://h5l.org/advisories.html?show=2017-12-08
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144
https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b…
https://github.com/heimdal/heimdal/issues/353
https://www.debian.org/security/2017/dsa-4055
http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html
http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html
http://h5l.org/advisories.html?show=2017-12-08
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144
https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b…
https://github.com/heimdal/heimdal/issues/353
https://www.debian.org/security/2017/dsa-4055
http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html
http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html