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CVE-2016-6866

Publication date 15 February 2017

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.

From the Ubuntu Security Team

It was discovered that slock incorrectly handled password hashes. An attacker could possibly use this issue to cause a denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
suckless-tools 18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
17.10 artful Ignored end of life
17.04 zesty Ignored end of life
16.10 yakkety Ignored end of life
16.04 LTS xenial
Not affected
14.04 LTS trusty
Fixed 40-1+deb8u2build0.14.04.1
12.04 LTS precise Ignored end of life

Notes

ratliff

for xenial and yakkety, the user must both disable pam and enable slock to be vulnerable

Severity score breakdown

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