CVE-2017-11368
Published: 9 August 2017
In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
From the Ubuntu Security Team
It was discovered that Kerberos incorrectly handled certain S4U2Self or S4U2Proxy requests. A remote authenticated attacker could possibly use this issue to cause a denial of service.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
krb5 Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(1.15.1-2)
|
| bionic |
Not vulnerable
(1.15.1-2)
|
|
| cosmic |
Not vulnerable
(1.15.1-2)
|
|
| disco |
Not vulnerable
(1.15.1-2)
|
|
| eoan |
Not vulnerable
(1.15.1-2)
|
|
| focal |
Not vulnerable
(1.15.1-2)
|
|
| trusty |
Released
(1.12+dfsg-2ubuntu5.4)
|
|
| upstream |
Released
(1.15.1-2)
|
|
| xenial |
Released
(1.13.2+dfsg-5ubuntu2.1)
|
|
| zesty |
Ignored
(end of life)
|
|
| groovy |
Not vulnerable
(1.15.1-2)
|
|
| hirsute |
Not vulnerable
(1.15.1-2)
|
|
|
Patches: upstream: https://github.com/krb5/krb5/pull/678/commits/a860385dd8fbd239fdb31b347e07f4e6b2fbdcc2 |
||
| Binaries built from this source package are in Universe and so are supported by the community. | ||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |