Name | CVE-2019-19126 |
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. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
References | DLA-3152-1 |
Debian Bugs | 945250 |
Vulnerable and fixed packages
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|
glibc (PTS) | buster | 2.28-10+deb10u1 | vulnerable |
| buster (security) | 2.28-10+deb10u2 | fixed |
| bullseye | 2.31-13+deb11u8 | fixed |
| bullseye (security) | 2.31-13+deb11u7 | fixed |
| bookworm, bookworm (security) | 2.36-9+deb12u4 | fixed |
| trixie | 2.37-15 | fixed |
| sid | 2.37-15.1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|
glibc | source | jessie | (not affected) | | | |
glibc | source | buster | 2.28-10+deb10u2 | | DLA-3152-1 | |
glibc | source | (unstable) | 2.29-8 | | | 945250 |
Notes
[jessie] - glibc <not-affected> (Vulnerable code introduced in 2.23)
https://sourceware.org/bugzilla/show_bug.cgi?id=25204
Introduced by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=object;h=b9eb92ab05204df772eb4929eccd018637c9f3e9
Fixed by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d5dfad4326fc683c813df1e37bbf5cf920591c8e