CVE Vulnerabilities

CVE-2019-20334

Uncontrolled Recursion

Published: Jan 04, 2020 | Modified: Jun 17, 2026
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
6.2 LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM

In Netwide Assembler (NASM) 2.14.02, stack consumption occurs in expr# functions in asm/eval.c. This potentially affects the relationships among expr0, expr1, expr2, expr3, expr4, expr5, and expr6 (and stdscan in asm/stdscan.c). This is similar to CVE-2019-6290 and CVE-2019-6291.

Weakness

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

Affected Software

NameVendorStart VersionEnd Version
Netwide_assemblerNasm2.14.02 (including)2.14.02 (including)
NasmUbuntubionic*
NasmUbuntudisco*
NasmUbuntueoan*
NasmUbuntuesm-apps-legacy/xenial*
NasmUbuntuesm-apps/bionic*
NasmUbuntuesm-apps/focal*
NasmUbuntuesm-apps/xenial*
NasmUbuntufocal*
NasmUbuntugroovy*
NasmUbuntuhirsute*
NasmUbuntuimpish*
NasmUbuntukinetic*
NasmUbuntulunar*
NasmUbuntumantic*
NasmUbuntuoracular*
NasmUbuntutrusty*
NasmUbuntuxenial*

Potential Mitigations

References