Vulnerability identifier: #VU17764

Vulnerability risk: Low

CVSSv3.1: 8.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-8343

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

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

Vendor: Netwide Assembler

Description

The vulnerability allows a local attacker to gain elevated privileges.

The vulnerability exists due to a use-after-free error in the paste_tokens function, as defined in the asm/preproc.c source code file. A local attacker can access the targeted system, make system calls that submit malicious input, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

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

Vulnerable software versions

Netwide Assembler: 2.14.02

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External links
http://bugzilla.nasm.us/show_bug.cgi?id=3392556

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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. However, proof of concept for this vulnerability is available.