High severity · published Jan 23, 2019
CVE-2019-6706
Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c
7.5
CVSS
17.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)17.4% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LU
Lua · Lua
5.3.5 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 18.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-6706
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-6706
Broken Link
http://lua-users.org/lists/lua-l/2019-01/msg00039.html
Exploit
http://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html
Third Party Advisory
https://access.redhat.com/security/cve/cve-2019-6706
Exploit
https://github.com/Lua-Project/cve-analysis/blob/a43c9ccd00274b31fa2f24c6c8f20ce36655682d/CVE-2019-6706.pdf
Patch
https://github.com/lua/lua/commit/89aee84cbc9224f638f3b7951b306d2ee8ecb71e
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/06/msg00031.html
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