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CVE-2018-5709

Published: 16 January 2018

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.

Notes

AuthorNote
ebarretto
according to debian security tracker: non-issue, codepath is
only run on trusted input, potential integer overflow is
non-issue
ccdm94
no patch available in 2022-05-11. Unlikely to have a security
impact. This is not considered a security issue according to
various sources.

Priority

Negligible

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
krb5
Launchpad, Ubuntu, Debian
impish Ignored
(end of life)
artful Ignored
(end of life)
bionic Ignored
(see notes)
cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Ignored
(see notes)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
jammy Ignored
(see notes)
trusty Ignored
(see notes)
upstream Deferred

xenial Ignored
(see notes)
Binaries built from this source package are in Universe and so are supported by the community.

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N