CVE-2021-4156 Information disclosure in libsndfile
High 7.1
Published
Updated
Check this codebase for CVE-2021-4156 and fix it if it is affected.
What it is: CVE-2021-4156 is a high-severity vulnerability in Debian Debian Linux, published on 23 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-4156 in the wild and no public exploit code.
Affected product: Debian Debian 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-2021-4156/ (Markdown: https://insights.sbomify.com/CVE-2021-4156/index.md)
An out-of-bounds read in libsndfile's FLAC codec allows attackers to cause crashes or leak memory information via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-4156?
CVE-2021-4156 is a high-severity vulnerability in Debian Debian Linux, published on 23 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.
Weakness: CWE-125
Which versions are affected by CVE-2021-4156?
It affects 2 products.
Linux distribution packages (40)
libsndfile AlmaLinux:8 | All versions | 1.0.28-12.el8 |
libsndfile-devel AlmaLinux:8 | All versions | 1.0.28-12.el8 |
libsndfile Red Hat:enterprise_linux:8::appstream | All versions | 0:1.0.28-12.el8 |
libsndfile-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:1.0.28-12.el8 |
libsndfile-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:1.0.28-12.el8 |
libsndfile-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:1.0.28-12.el8 |
libsndfile-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:1.0.28-12.el8 |
libsndfile-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:1.0.28-12.el8 |
libsndfile-devel Red Hat:enterprise_linux:8::crb | All versions | 0:1.0.28-12.el8 |
libsndfile-utils-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:1.0.28-12.el8 |
libsndfile Rocky Linux:8 | All versions | 0:1.0.28-12.el8 |
libsndfile SUSE:Enterprise Storage 6 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Enterprise Storage 7 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:HPE Helion OpenStack 8 | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Module for Package Hub 15 SP3 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Point of Sale 11 SP3 | All versions | 1.0.20-2.19.18.1 |
libsndfile SUSE:Linux Enterprise Real Time 15 SP2 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server 11 SP4-LTSS | All versions | 1.0.20-2.19.18.1 |
libsndfile SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server 12 SP5 | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server 15 SP2-BCL | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server 15-LTSS | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 1.0.25-36.26.1 |
libsndfile SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 1.0.28-5.15.1 |
libsndfile SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 1.0.28-5.15.1 |
Products include Debian Debian Linux, Libsndfile Project Libsndfile.
How do I fix CVE-2021-4156?
Apply the vendor's patch.
Is CVE-2021-4156 being exploited?
There is no known exploitation of CVE-2021-4156 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALSA-2022:1968, DEBIAN-CVE-2021-4156, DLA-3126-1, DLA-4402-1, GHSA-vvgm-gfhp-rj9x, OESA-2022-1680 and 10 more.