UBUNTU-CVE-2017-17439

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Source
https://ubuntu.com/security/CVE-2017-17439
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-17439.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2017-17439
Related
Published
2017-12-06T15:29:00Z
Modified
2017-12-06T15:29:00Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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 kdcasrep function in kdc/kerberos5.c and the derlengthvisiblestring function in lib/asn1/der_length.c.

References

Affected packages

Ubuntu:18.04:LTS / heimdal

Package

Name
heimdal
Purl
pkg:deb/ubuntu/heimdal?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.5.0+dfsg-1

Affected versions

7.*

7.4.0.dfsg.1-2

Ecosystem specific 

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            "binary_name": "heimdal-dev"
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            "binary_name": "heimdal-kcm"
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