CVE-2018-20673 Integer overflow in n/a
Medium 5.5
Published
Updated
Check this codebase for CVE-2018-20673 and fix it if it is affected.
What it is: CVE-2018-20673 is a medium-severity vulnerability in Gnu Binutils, published on 4 Jan 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-20673 in the wild and no public exploit code.
Affected product: Gnu Binutils. 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-2018-20673/ (Markdown: https://insights.sbomify.com/CVE-2018-20673/index.md)
An integer overflow in GNU libiberty's demangle_template function can lead to a heap-based buffer overflow, potentially allowing code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-20673?
CVE-2018-20673 is a medium-severity vulnerability in Gnu Binutils, published on 4 Jan 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, contains an integer overflow vulnerability (for "Create an array for saving the template argument values") that can trigger a heap-based buffer overflow, as demonstrated by nm.
Which versions are affected by CVE-2018-20673?
It affects 1 product.
Linux distribution packages (40)
cpp AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc-c++ AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc-gdb-plugin AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc-gfortran AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc-offload-nvptx AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
gcc-plugin-devel AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
libitm-devel AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
libquadmath-devel AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
libstdc++-devel AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
libstdc++-docs AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
libstdc++-static AlmaLinux:8 | All versions | 8.5.0-3.el8.alma |
cpp Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
cpp-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-c++ Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-c++-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-gdb-plugin Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-gdb-plugin-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-gfortran Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-gfortran-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-offload-nvptx Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-offload-nvptx-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
gcc-plugin-devel-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libasan-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libatomic-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libgcc-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libgfortran-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libgomp-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libgomp-offload-nvptx-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libitm-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libitm-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
liblsan-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libquadmath-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libquadmath-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libstdc++-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libstdc++-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
libstdc++-docs Red Hat:enterprise_linux:8::appstream | All versions | 0:8.5.0-3.el8 |
Products include Gnu Binutils.
How do I fix CVE-2018-20673?
Apply the vendor's patch.
Is CVE-2018-20673 being exploited?
There is no known exploitation of CVE-2018-20673 in the wild and no public exploit code.
Other vulnerabilities in Gnu Binutils
Sources
Also known as ALSA-2021:4386, AZL-41601, DEBIAN-CVE-2018-20673, ECHO-4d86-022a-58ee, GHSA-jx5v-cp2v-88f2, RHSA-2021:4386 and 3 more.