CVE-2019-6706

Published: 23 January 2019

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.

Notes

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

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
lua5.1 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	cosmic	Not vulnerable (code not present)
	trusty	Not vulnerable (code not present)
	upstream	Needs triage
	xenial	Not vulnerable (code not present)
lua5.2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	cosmic	Not vulnerable (code not present)
	trusty	Not vulnerable (code not present)
	upstream	Needs triage
	xenial	Not vulnerable (code not present)
lua5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.3-1ubuntu0.18.04.1)
	cosmic	Released (5.3.3-1ubuntu0.18.10.1)
	trusty	Does not exist
	upstream	Needs triage
	xenial	Released (5.3.1-1ubuntu2.1)
lua50 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	cosmic	Not vulnerable (code not present)
	trusty	Does not exist (trusty was not-affected [code not present])
	upstream	Needs triage
	xenial	Not vulnerable (code not present)

Severity score breakdown

Parameter	Value
Base score	7.5
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

Bugs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=920321

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