Vulnerability CVE-2018-20573

Vulnerability Name:

CVE-2018-20573 (CCN-154877)

Assigned:

2018-12-28

Published:

2018-12-28

Updated:

2019-01-10

Summary:

The Scanner::EnsureTokensInQueue function in yaml-cpp (aka LibYaml-C++) 0.6.2 allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted YAML file.

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/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): Network 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-119

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-20573

Source: XF
Type: UNKNOWN
yamlcpp-cve201820573-dos(154877)

Source: CCN
Type: yaml-cpp GIT Repository
Stack Overflow in Scanner::EnsureTokensInQueue() #655

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/jbeder/yaml-cpp/issues/655

Source: CCN
Type: IBM Security Bulletin 6601733 (Security Verify Access)
Multiple security vulnerabilities found in open source code that is shipped with IBM Security Verify Access

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20573

Vulnerable Configuration:

Configuration 1:

cpe:/a:yaml-cpp_project:yaml-cpp:0.6.2:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:yaml-cpp_project:yaml-cpp:0.6.2:*:*:*:*:*:*:*

AND

cpe:/a:ibm:security_verify_access:10.0.2.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:security_verify_access:10.0.0.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:security_verify_access:10.0.1.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:security_verify_access:10.0.3.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:7706	P	libyaml-cpp0_6-0.6.3-150400.4.3.1 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:7984	P	yaml-cpp-devel-0.6.3-150400.4.3.1 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:3113	P	java-1_7_1-ibm-1.7.1_sr4.50-38.41.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3361	P	sane-backends-1.0.24-3.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:94743	P	libyaml-cpp0_6-0.6.3-150400.2.5 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:94991	P	yaml-cpp-devel-0.6.3-150400.2.5 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:42364	P	Security update for yaml-cpp (Moderate)	2022-04-13
oval:org.opensuse.security:def:42260	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:101579	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:6323	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:100060	P	(Moderate)	2022-04-01
oval:org.opensuse.security:def:101747	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:99197	P	(Moderate)	2022-04-01
oval:org.opensuse.security:def:119048	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:100394	P	(Moderate)	2022-04-01
oval:org.opensuse.security:def:848	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:99467	P	(Moderate)	2022-04-01
oval:org.opensuse.security:def:42169	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:100727	P	(Moderate)	2022-04-01
oval:org.opensuse.security:def:1056	P	Security update for yaml-cpp (Moderate)	2022-04-01
oval:org.opensuse.security:def:99729	P	(Moderate)	2022-04-01
oval:com.ubuntu.disco:def:2018205730000000	V	CVE-2018-20573 on Ubuntu 19.04 (disco) - low.	2018-12-28
oval:com.ubuntu.bionic:def:201820573000	V	CVE-2018-20573 on Ubuntu 18.04 LTS (bionic) - low.	2018-12-28
oval:com.ubuntu.cosmic:def:2018205730000000	V	CVE-2018-20573 on Ubuntu 18.10 (cosmic) - low.	2018-12-28
oval:com.ubuntu.cosmic:def:201820573000	V	CVE-2018-20573 on Ubuntu 18.10 (cosmic) - low.	2018-12-28
oval:com.ubuntu.bionic:def:2018205730000000	V	CVE-2018-20573 on Ubuntu 18.04 LTS (bionic) - low.	2018-12-28
oval:com.ubuntu.trusty:def:201820573000	V	CVE-2018-20573 on Ubuntu 14.04 LTS (trusty) - low.	2018-12-28
oval:com.ubuntu.xenial:def:2018205730000000	V	CVE-2018-20573 on Ubuntu 16.04 LTS (xenial) - low.	2018-12-28
oval:com.ubuntu.xenial:def:201820573000	V	CVE-2018-20573 on Ubuntu 16.04 LTS (xenial) - low.	2018-12-28

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