Vulnerability CVE-2018-20457

Vulnerability Name:

CVE-2018-20457 (CCN-154781)

Assigned:

2018-12-04

Published:

2018-12-04

Updated:

2020-10-15

Summary:

In radare2 through 3.1.3, the assemble function inside libr/asm/p/asm_arm_cs.c allows attackers to cause a denial-of-service (application crash via an r_num_calc out-of-bounds read) by crafting an arm assembly input because a loop uses an incorrect index in armass.c and certain length validation is missing in armass64.c, a related issue to CVE-2018-20459.

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

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
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

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
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-2018-20457

Source: XF
Type: UNKNOWN
radare2-cve201820457-dos(154781)

Source: CCN
Type: radare2 GIT Repository
AddressSanitizer: heap-buffer-overflow (OOB read) at libr/util/calc.c:384 #12417

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/radare/radare2/issues/12417

Source: MISC
Type: Patch, Vendor Advisory
https://github.com/radareorg/radare2/commit/e5c14c167b0dcf0a53d76bd50bacbbcc0dfc1ae7

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20457

Vulnerable Configuration:

Configuration 1:

cpe:/a:radare:radare2:*:*:*:*:*:*:*:* (Version <= 3.1.3)

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:2018204570000000	V	CVE-2018-20457 on Ubuntu 19.04 (disco) - medium.	2018-12-25
oval:com.ubuntu.bionic:def:201820457000	V	CVE-2018-20457 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-25
oval:com.ubuntu.cosmic:def:2018204570000000	V	CVE-2018-20457 on Ubuntu 18.10 (cosmic) - medium.	2018-12-25
oval:com.ubuntu.cosmic:def:201820457000	V	CVE-2018-20457 on Ubuntu 18.10 (cosmic) - medium.	2018-12-25
oval:com.ubuntu.bionic:def:2018204570000000	V	CVE-2018-20457 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-25
oval:com.ubuntu.trusty:def:201820457000	V	CVE-2018-20457 on Ubuntu 14.04 LTS (trusty) - medium.	2018-12-25
oval:com.ubuntu.xenial:def:2018204570000000	V	CVE-2018-20457 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-25
oval:com.ubuntu.xenial:def:201820457000	V	CVE-2018-20457 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-25

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