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
| Author | Note |
|---|---|
| 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
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 |