Information disclosure in Glibc - CVE-2019-19126

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Main Vulnerability Database Vulnerabilities #VU30596

Information disclosure in Glibc - CVE-2019-19126

Published: November 19, 2019 / Updated: July 17, 2020


Vulnerability identifier: #VU30596
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-19126
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: GNU
Affected software:
Glibc

Detailed vulnerability description

The vulnerability allows a local authenticated user to gain access to sensitive information.

On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.


How to mitigate CVE-2019-19126

Install update from vendor's website.

Sources