#VU37381 Out-of-bounds read in Netwide Assembler - CVE-2018-8883

Vulnerability identifier: #VU37381

Vulnerability risk: Medium

CVSSv4.0: 5.9 [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/E:U/U:Green]

CVE-ID: CVE-2018-8883

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Netwide Assembler
Universal components / Libraries / Scripting languages

Vendor: Netwide Assembler

Description

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.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Netwide Assembler: 2.13.02

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

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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