CVE-2019-19126: glibc before 2.31 (exclusive); +7 more affected products

Affected technology

glibc · before 2.31 (exclusive)
gnu

ubuntu linux · 16.04
canonical

ubuntu linux · 18.04
canonical

ubuntu linux · 19.10
canonical

fedora · 30
fedoraproject

fedora · 31
fedoraproject

debian linux · 10.0
debian

n/a · n/a
Vendor not specified by the source

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

Component: Not specified by the source

Attack conditions (NVD, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

The source says 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. NVD’s CVSS 3.1 assessment (base score 3.3/10) rates confidentiality impact as low; integrity and availability impact as none.