PT-2021-6705 · Unknown+2 · Netwide Assembler+2

Published 2021-08-25 · Updated 2024-12-16 · CVE-2020-18974

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Netwide Assembler (NASM) version v2.15.xx

Description The issue is related to a buffer overflow in the crc64i function of the nasmlib/crc64 component. This allows attackers to cause a denial of service. The problem is associated with the copying of a buffer without checking the input data, which can be exploited by a remote attacker to disrupt service.

Recommendations For Netwide Assembler (NASM) version v2.15.xx, consider disabling the crc64i function in the nasmlib/crc64 component as a temporary workaround until a patch is available. Restrict access to the nasmlib/crc64 component to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

ALT-PU-2023-1613

ALT-PU-2024-16908

BDU:2022-02064

CVE-2020-18974

Affected Products

Alt Linux

Debian

Netwide Assembler

References · 10

• 🔥 https://bugzilla.nasm.us/show_bug.cgi?id=3392568 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-18974 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-18974 · Security Note
• https://ubuntu.com/security/CVE-2020-18974 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-18974 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-18974 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-18974 · Security Note
• https://bdu.fstec.ru/vul/2022-02064 · Security Note
• https://osv.dev/vulnerability/CVE-2020-18974 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2020-18974 · Note