Vulnerability CVE-2019-6291

Vulnerability Name:

CVE-2019-6291 (CCN-155612)

Assigned:

2019-01-03

Published:

2019-01-03

Updated:

2020-08-24

Summary:

An issue was discovered in the function expr6 in eval.c in Netwide Assembler (NASM) through 2.14.02. There is a stack exhaustion problem caused by the expr6 function making recursive calls to itself in certain scenarios involving lots of '!' or '+' or '-' characters. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted asm file.

CVSS v3 Severity:

5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

3.3 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
2.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-674

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2019-6291

Source: CCN
Type: Bugzilla Bug 3392549
Stack Exhaustion Problem Caused By the expr6 Function Making Recursive Calls to Itself

Source: MISC
Type: Exploit, Issue Tracking, Vendor Advisory
https://bugzilla.nasm.us/show_bug.cgi?id=3392549

Source: XF
Type: UNKNOWN
nasm-cve20196291-dos(155612)

Source: CCN
Type: NASM Web site
NASM

Vulnerable Configuration:

Configuration 1:

cpe:/a:nasm:netwide_assembler:*:*:*:*:*:*:*:* (Version <= 2.14.02)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:201962910000000	V	CVE-2019-6291 on Ubuntu 19.04 (disco) - negligible.	2019-01-15
oval:com.ubuntu.bionic:def:201962910000000	V	CVE-2019-6291 on Ubuntu 18.04 LTS (bionic) - negligible.	2019-01-15
oval:com.ubuntu.xenial:def:201962910000000	V	CVE-2019-6291 on Ubuntu 16.04 LTS (xenial) - negligible.	2019-01-15
oval:com.ubuntu.bionic:def:20196291000	V	CVE-2019-6291 on Ubuntu 18.04 LTS (bionic) - negligible.	2019-01-14
oval:com.ubuntu.cosmic:def:201962910000000	V	CVE-2019-6291 on Ubuntu 18.10 (cosmic) - negligible.	2019-01-14
oval:com.ubuntu.cosmic:def:20196291000	V	CVE-2019-6291 on Ubuntu 18.10 (cosmic) - negligible.	2019-01-14
oval:com.ubuntu.trusty:def:20196291000	V	CVE-2019-6291 on Ubuntu 14.04 LTS (trusty) - negligible.	2019-01-14
oval:com.ubuntu.xenial:def:20196291000	V	CVE-2019-6291 on Ubuntu 16.04 LTS (xenial) - negligible.	2019-01-14

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