CVE-2017-2625
Published: 27 July 2018
It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.
Notes
| Author | Note |
|---|---|
| tyhicks | 1.1.2 and lower are affected |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libxdmcp Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
| bionic |
Released
(1:1.1.2-3)
|
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(1:1.1.2-3)
|
|
| eoan |
Released
(1:1.1.2-3)
|
|
| focal |
Released
(1:1.1.2-3)
|
|
| groovy |
Released
(1:1.1.2-3)
|
|
| hirsute |
Released
(1:1.1.2-3)
|
|
| impish |
Released
(1:1.1.2-3)
|
|
| jammy |
Released
(1:1.1.2-3)
|
|
| kinetic |
Released
(1:1.1.2-3)
|
|
| precise |
Ignored
(end of life)
|
|
| trusty |
Released
(1:1.1.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(1:1.1.2-2)
|
|
| xenial |
Released
(1:1.1.2-1.1ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| yakkety |
Ignored
(end of life)
|
|
| zesty |
Ignored
(end of life)
|
|
|
Patches: upstream: https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1f upstream: https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=6d1aee0310001eca8f6ded9814a2a70b3a774896 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |