CVE-2017-17820

low-risk

Published 2017-12-21

In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in pp_list_one_macro in asm/preproc.c that will lead to a remote denial of service attack, related to mishandling of operand-type errors.

Do I need to act?

0.18% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.5/10 Medium

LOCAL / LOW complexity

Affected Products (2)

Netwide Assembler

Ubuntu Linux

Affected Vendors

Canonical Nasm

References (4)

Exploit https://bugzilla.nasm.us/show_bug.cgi?id=3392433

Third Party Advisory https://usn.ubuntu.com/3694-1/

Exploit https://bugzilla.nasm.us/show_bug.cgi?id=3392433

Third Party Advisory https://usn.ubuntu.com/3694-1/

/ 100

low-risk

Severity 18/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 7/34 · Low