Description
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.
References (5)
Core 5
Core References
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZFJ5E7NWOL6ROE5QVICHKIOUGCPFJVUH/
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4FQ5LC6JOYSOYFPRUZ4S45KL6IP3RPPZ/
Third Party Advisory vendor-advisory
https://usn.ubuntu.com/4416-1/
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
Issue Tracking, Patch, Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=25204
Scores
CVSS v3
3.3
EPSS
0.0041
EPSS Percentile
32.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-665
Status
published
Products (7)
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
debian/debian_linux
10.0
fedoraproject/fedora
30
fedoraproject/fedora
31
gnu/glibc
< 2.31
Published
Nov 19, 2019
Tracked Since
Feb 18, 2026