CVE-2019-19520: CVE-2019-19520

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I. Basic Information for CVE-2019-19520

Vulnerability Information

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Vulnerability Title

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Description

xlock in OpenBSD 6.6 allows local users to gain the privileges of the auth group by providing a LIBGL_DRIVERS_PATH environment variable, because xenocara/lib/mesa/src/loader/loader.c mishandles dlopen.

Source: NVD (National Vulnerability Database)

CVSS Information

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Type

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Title

OpenBSD 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

OpenBSD是加拿大OpenBSD项目组的一套跨平台的、基于BSD的类UNIX操作系统。 OpenBSD 6.6版本中的xlock存在安全漏洞，该漏洞源于xenocara/lib/mesa/src/loader/loader.c文件没有正确处理dlopen。本地攻击者可通过提交LIBGL_DRIVERS_PATH环境变量利用该漏洞获取‘auth’组的权限。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
-	n/a	n/a	-

II. Public POCs for CVE-2019-19520

#	POC Description	Source Link	Shenlong Link
1	Script that automates the process of escalating privileges on openbsd system (CVE-2019-19520) by exploiting the xlock binary and againing it's sgid and escalating to the root user by (CVE-2019-19522) exploiting the privileges of auth group and adding keys to the Skey or Yubikey	https://github.com/retrymp3/Openbsd-Privilege-Escalation	POC Details

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No public POC found.

III. Intelligence Information for CVE-2019-19520

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https://www.openwall.com/lists/oss-security/2019/12/04/5x_refsource_MISC
https://www.openbsd.org/errata66.htmlx_refsource_MISC
http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.htmlx_refsource_MISC
https://seclists.org/bugtraq/2019/Dec/8mailing-listx_refsource_BUGTRAQ
http://seclists.org/fulldisclosure/2019/Dec/14mailing-listx_refsource_FULLDISC
http://www.openwall.com/lists/oss-security/2019/12/04/5mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2019/12/04/6mailing-listx_refsource_MLIST
https://nvd.nist.gov/vuln/detail/CVE-2019-19520

IV. Related Vulnerabilities

Same product: n/a

Same vendor: n/a

V. Comments for CVE-2019-19520

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I. Basic Information for CVE-2019-19520

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2019-19520

III. Intelligence Information for CVE-2019-19520

IV. Related Vulnerabilities

V. Comments for CVE-2019-19520

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