CVE-2020-15945
Published: 24 July 2020
Lua through 5.4.0 has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) because it incorrectly expects that an oldpc value is always updated upon a return of the flow of control to a function.
Notes
| Author | Note |
|---|---|
| sbeattie | older luas need checking as the code has changed but may still be vulnerable |
| mdeslaur | couldn't reproduce on lua earlier than 5.4. No indication that earlier versions are vulnerable. Marking not-affected. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
lua5.1 Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
| bionic |
Not vulnerable
|
|
| focal |
Not vulnerable
|
|
| groovy |
Not vulnerable
|
|
| hirsute |
Not vulnerable
|
|
| impish |
Not vulnerable
|
|
| jammy |
Not vulnerable
|
|
| trusty |
Not vulnerable
|
|
| xenial |
Not vulnerable
|
|
|
lua5.2 Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
| bionic |
Not vulnerable
|
|
| focal |
Not vulnerable
|
|
| groovy |
Not vulnerable
|
|
| hirsute |
Not vulnerable
|
|
| impish |
Not vulnerable
|
|
| jammy |
Not vulnerable
|
|
| trusty |
Not vulnerable
|
|
| xenial |
Not vulnerable
|
|
|
lua5.3 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| upstream |
Needs triage
|
|
| jammy |
Not vulnerable
|
|
| bionic |
Not vulnerable
|
|
| focal |
Not vulnerable
|
|
| groovy |
Not vulnerable
|
|
| hirsute |
Not vulnerable
|
|
| impish |
Not vulnerable
|
|
| xenial |
Not vulnerable
|
|
|
lua5.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Not vulnerable
(5.4.1-1)
|
|
| impish |
Not vulnerable
(5.4.1-1)
|
|
| jammy |
Not vulnerable
(5.4.1-1)
|
|
|
Patches: upstream: https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 |
||
|
lua50 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| upstream |
Needs triage
|
|
| bionic |
Not vulnerable
|
|
| focal |
Not vulnerable
|
|
| groovy |
Not vulnerable
|
|
| hirsute |
Not vulnerable
|
|
| impish |
Not vulnerable
|
|
| jammy |
Does not exist
|
|
| xenial |
Not vulnerable
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |