SB2018032110 - Multiple vulnerabilities in Netwide Assembler

Description

This security bulletin contains information about 2 vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2018-8882)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/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 when processing a large shift value. A remote unauthenticated attacker can trigger stack-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-2018-8883)

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

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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 buffer over-read in the parse_line function in asm/parser.c via uncontrolled access to nasm_reg_flags. A remote attacker can perform a denial of service attack.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.html
• https://bugzilla.nasm.us/show_bug.cgi?id=3392445
• https://bugzilla.nasm.us/show_bug.cgi?id=3392447