Resource exhaustion in yaml-cpp - CVE-2019-6292

Vulnerability identifier: #VU36237

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-6292

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

An issue was discovered in singledocparser.cpp in yaml-cpp (aka LibYaml-C++) 0.6.2. Stack Exhaustion occurs in YAML::SingleDocParser, and there is a stack consumption problem caused by recursive stack frames: HandleCompactMap, HandleMap, HandleFlowSequence, HandleSequence, HandleNode. Remote attackers could leverage this vulnerability to cause a denial-of-service via a cpp file.

yaml-cpp
EMC Cloud Tiering Appliance
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Enterprise Storage
SUSE Linux Enterprise Storage
SUSE Linux Enterprise Server
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Installer
SUSE Linux Enterprise Realtime Extension
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Desktop Applications
libyaml-cpp0_5
libyaml-cpp0_5-debuginfo
yaml-cpp-debugsource
libyaml-cpp0_6
libyaml-cpp0_6-debuginfo
yaml-cpp-devel

Install update from vendor's website.

libyaml-cpp0_5 - update to 0.5.3-3.6.3
libyaml-cpp0_5-debuginfo - update to 0.5.3-3.6.3
yaml-cpp-debugsource - addressed in versions 0.5.3-3.6.3, 0.6.1-4.5.1
libyaml-cpp0_6 - update to 0.6.1-4.5.1
libyaml-cpp0_6-debuginfo - update to 0.6.1-4.5.1
yaml-cpp-devel - update to 0.6.1-4.5.1
EMC Cloud Tiering Appliance - update to 13.2.0.2.22

• https://github.com/jbeder/yaml-cpp/issues/657

• Multiple vulnerabilities in yaml-cpp
• SUSE update for yaml-cpp
• SUSE update for yaml-cpp
• SUSE update for yaml-cpp
• SUSE update for yaml-cpp
• Multiple vulnerabilities in Dell Cloud Tiering Appliance