PT-2018-15416 · Netwide+1 · Netwide Assembler+1

Ganshuitao · Published 2018-12-28 · Updated 2019-01-18 · CVE-2018-20535

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Netwide Assembler (NASM) version 2.14rc16

Description The issue is related to a use-after-free error in the pp getline function at asm/preproc.c. This error can cause a denial of service when attempting to increment the line number.

Recommendations For Netwide Assembler (NASM) version 2.14rc16, consider avoiding the use of the pp getline function until a patch is available. As a temporary workaround, restrict access to the asm/preproc.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2018-20535

Affected Products

Astra Linux

Netwide Assembler

References · 8

• 🔥 https://bugzilla.nasm.us/show_bug.cgi?id=3392530 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20535 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20535 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20535 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-20535 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20535 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-20535 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-20535 · Security Note