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Vulnerability of OpenBSD: privilege escalation via ld.so suid/sgid LD_LIBRARY_PATH

Synthesis of the vulnerability 

An attacker can bypass restrictions via ld.so suid/sgid LD_LIBRARY_PATH of OpenBSD, in order to escalate his privileges.
Vulnerable products: OpenBSD.
Severity of this weakness: 2/4.
Creation date: 12/12/2019.
Références of this bulletin: CVE-2019-19726, VIGILANCE-VUL-31140.

Description of the vulnerability 

An attacker can bypass restrictions via ld.so suid/sgid LD_LIBRARY_PATH of OpenBSD, in order to escalate his privileges.
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This computer threat impacts software or systems such as OpenBSD.

Our Vigil@nce team determined that the severity of this computer vulnerability alert is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a specialist ability can exploit this cybersecurity weakness.

Solutions for this threat 

OpenBSD: patch for ld.so suid/sgid LD_LIBRARY_PATH.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/024_ldso.patch.sig
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/013_ldso.patch.sig
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