CVE-2019-6706

Publication date 23 January 2019

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.

Read the notes from the security team

Status

Package Ubuntu Release Status
lua5.1 18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
lua5.2 18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
lua5.3 18.10 cosmic
Fixed 5.3.3-1ubuntu0.18.10.1
18.04 LTS bionic
Fixed 5.3.3-1ubuntu0.18.04.1
16.04 LTS xenial
Fixed 5.3.1-1ubuntu2.1
14.04 LTS trusty Not in release
lua50 18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes

mdeslaur

as of 2019-02-28, proposed fix not committed per debian, 5.0, 5.1 and 5.2 aren't affected

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references