#VU34131 Out-of-bounds read in LuaJIT and Debian Linux - CVE-2020-15890

Vulnerability identifier: #VU34131

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15890

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LuaJIT
Other software / Other software solutions
Debian Linux
Operating systems & Components / Operating system

Vendor: siddhesh (Siddhesh Poyarekar)
Debian

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

LuaJit through 2.1.0-beta3 has an out-of-bounds read because __gc handler frame traversal is mishandled.

Mitigation
Install update from vendor's website.

Vulnerable software versions

LuaJIT: 2.1.0

Debian Linux: 2.1.0 - 9.0

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External links
https://github.com/LuaJIT/LuaJIT/issues/601
https://lists.debian.org/debian-lts-announce/2020/07/msg00026.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.