SB2020101807 - Arch Linux update for lua

Description

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2020-15888)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error during interaction between stack resizes and garbage collection in ldo.c file. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Out-of-bounds read (CVE-ID: CVE-2020-15889)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to getobjname heap-based buffer over-read within the youngcollection() function in lgc.c that uses markold for an insufficient number of list members. A remote attacker can perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• https://security.archlinux.org/advisory/ASA-202010-5