| 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 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| glibc (PTS) | bullseye | 2.31-13+deb11u11 | fixed |
| bullseye (security) | 2.31-13+deb11u10 | fixed | |
| bookworm | 2.36-9+deb12u9 | fixed | |
| bookworm (security) | 2.36-9+deb12u7 | fixed | |
| sid, trixie | 2.40-4 | 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 |
[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