glibc: CVE-2019-19126

Debian Bug report logs - #945250
glibc: CVE-2019-19126

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: glibc: CVE-2019-19126

Date: Thu, 21 Nov 2019 22:38:12 +0100

Source: glibc
Version: 2.29-3
Severity: important
Tags: security upstream
Forwarded: https://sourceware.org/bugzilla/show_bug.cgi?id=25204
Control: found -1 2.28-10
Control: found -1 2.24-11+deb9u1
Control: found -1 2.24-11+deb9u4
Control: found -1 2.24-11

Hi,

The following vulnerability was published for glibc, filling this bug
mainly for tracking purpose, it was reported upstream at [1].

CVE-2019-19126[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2019-19126
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19126
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=25204

Regards,
Salvatore

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