Vulnerability Details : CVE-2019-19126
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.
Products affected by CVE-2019-19126
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:x64:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-19126
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-19126
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST | |
|
3.3
|
LOW | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
1.8
|
1.4
|
NIST |
CWE ids for CVE-2019-19126
-
The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19126
-
https://sourceware.org/bugzilla/show_bug.cgi?id=25204
25204 – LD_PREFER_MAP_32BIT_EXEC not ignored in setuid binariesIssue Tracking;Patch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4FQ5LC6JOYSOYFPRUZ4S45KL6IP3RPPZ/
[SECURITY] Fedora 30 Update: glibc-2.29-28.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZFJ5E7NWOL6ROE5QVICHKIOUGCPFJVUH/
[SECURITY] Fedora 31 Update: glibc-2.30-10.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://usn.ubuntu.com/4416-1/
USN-4416-1: GNU C Library vulnerabilities | Ubuntu security notices | UbuntuThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
[SECURITY] [DLA 3152-1] glibc security updateMailing List;Third Party Advisory
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