CVE-2019-6706: Use After Free
First published: Wed Jan 23 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Lua Lua | =5.3.5 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =18.10 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://lua-users.org/lists/lua-l/2019-01/msg00039.html
- http://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html
- https://access.redhat.com/security/cve/cve-2019-6706
- https://github.com/Lua-Project/cve-analysis/blob/a43c9ccd00274b31fa2f24c6c8f20ce36655682d/CVE-2019-6706.pdf
- https://github.com/lua/lua/commit/89aee84cbc9224f638f3b7951b306d2ee8ecb71e
- https://lists.debian.org/debian-lts-announce/2023/06/msg00031.html
Frequently Asked Questions
What is CVE-2019-6706?
CVE-2019-6706 is a vulnerability in Lua 5.3.5 that allows an attacker to achieve a crash outcome by triggering a debug.upvaluejoin call with certain arguments.
What is the severity of CVE-2019-6706?
The severity of CVE-2019-6706 is high, with a severity score of 7.5.
Which software versions are affected by CVE-2019-6706?
Lua 5.3.5 and Canonical Ubuntu Linux versions 16.04, 18.04, and 18.10 are affected by CVE-2019-6706.
How can an attacker exploit CVE-2019-6706?
An attacker can exploit CVE-2019-6706 by triggering a debug.upvaluejoin call with specific arguments.
Are there any references for CVE-2019-6706?
Yes, you can find references for CVE-2019-6706 at the following links: http://lua-users.org/lists/lua-l/2019-01/msg00039.html, http://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html, and https://access.redhat.com/security/cve/cve-2019-6706.
- collector/nvd-index
- agent/severity
- agent/weakness
- agent/author
- agent/references
- agent/type
- agent/event
- agent/description
- agent/remedy
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/lua
- canonical/lua lua
- version/lua lua/5.3.5
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/18.10