Vulnerability CVE-2018-20456

Vulnerability Name:

CVE-2018-20456 (CCN-154780)

Assigned:

2018-12-04

Published:

2018-12-04

Updated:

2018-12-31

Summary:

In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash in libr/util/strbuf.c via a stack-based buffer over-read) by crafting an input file, a related issue to CVE-2018-20455.

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)
4.8 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:O/RC:C)

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:O/RC:C)

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-125

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-20456

Source: XF
Type: UNKNOWN
radare2-cve201820456-dos(154780)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185

Source: CCN
Type: radare2 GIT Repository
AddressSanitizer: stack-buffer-overflow at libr/util/strbuf.c:47 #12372

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/radare/radare2/issues/12372

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20456

Vulnerable Configuration:

Configuration 1:

cpe:/a:radare:radare2:*:*:*:*:*:*:*:* (Version < 3.1.1)

Configuration CCN 1:

cpe:/a:radare:radare2:3.1.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:2018204560000000	V	CVE-2018-20456 on Ubuntu 19.04 (disco) - medium.	2018-12-25
oval:com.ubuntu.bionic:def:201820456000	V	CVE-2018-20456 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-25
oval:com.ubuntu.cosmic:def:2018204560000000	V	CVE-2018-20456 on Ubuntu 18.10 (cosmic) - medium.	2018-12-25
oval:com.ubuntu.cosmic:def:201820456000	V	CVE-2018-20456 on Ubuntu 18.10 (cosmic) - medium.	2018-12-25
oval:com.ubuntu.bionic:def:2018204560000000	V	CVE-2018-20456 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-25
oval:com.ubuntu.trusty:def:201820456000	V	CVE-2018-20456 on Ubuntu 14.04 LTS (trusty) - medium.	2018-12-25
oval:com.ubuntu.xenial:def:2018204560000000	V	CVE-2018-20456 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-25
oval:com.ubuntu.xenial:def:201820456000	V	CVE-2018-20456 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-25

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