CVE-2019-19126 Security feature bypass in n/a
Low 3.3
Published
Updated
Check this codebase for CVE-2019-19126 and fix it if it is affected.
What it is: CVE-2019-19126 is a low-severity vulnerability in Canonical Ubuntu Linux, published on 19 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-19126 in the wild and no public exploit code.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2019-19126/ (Markdown: https://insights.sbomify.com/CVE-2019-19126/index.md)
Local attackers can bypass ASLR in setuid programs by exploiting LD_PREFER_MAP_32BIT_EXEC handling in glibc on x86-64 systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-19126?
CVE-2019-19126 is a low-severity vulnerability in Canonical Ubuntu Linux, published on 19 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-665
Which versions are affected by CVE-2019-19126?
It affects 4 products.
Linux distribution packages (40)
glibc Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-common Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-debuginfo-common Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-devel Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-headers Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-static Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc-utils Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
nscd Red Hat:enterprise_linux:7::client | All versions | 0:2.17-317.el7 |
glibc Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-common Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-debuginfo-common Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-headers Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-static Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc-utils Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
nscd Red Hat:enterprise_linux:7::computenode | All versions | 0:2.17-317.el7 |
glibc Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-common Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-debuginfo-common Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-headers Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-static Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc-utils Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
nscd Red Hat:enterprise_linux:7::server | All versions | 0:2.17-317.el7 |
glibc Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-common Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-debuginfo-common Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-headers Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-static Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
glibc-utils Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
nscd Red Hat:enterprise_linux:7::workstation | All versions | 0:2.17-317.el7 |
compat-libpthread-nonshared Red Hat:enterprise_linux:8::appstream | All versions | 0:2.28-101.el8 |
glibc-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.28-101.el8 |
glibc-debuginfo-common Red Hat:enterprise_linux:8::appstream | All versions | 0:2.28-101.el8 |
glibc-utils Red Hat:enterprise_linux:8::appstream | All versions | 0:2.28-101.el8 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Gnu Glibc.
How do I fix CVE-2019-19126?
Upgrade to a fixed version.
Is CVE-2019-19126 being exploited?
There is no known exploitation of CVE-2019-19126 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2019-19126, GHSA-p4p6-gwhq-q5q7, MGASA-2019-0349, RHSA-2020:1828, RHSA-2020:3861, SUSE-SU-2020:0262-1 and 1 more.