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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
17.04 zesty Ignored
16.10 yakkety Ignored
16.04 LTS xenial
Not affected
14.04 LTS trusty
Fixed 40-1+deb8u2build0.14.04.1
12.04 LTS precise Ignored

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