CVE-2017-9461 Denial of service in n/a
Medium 6.5
Published
Updated
Check this codebase for CVE-2017-9461 and fix it if it is affected.
What it is: CVE-2017-9461 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 6 Jun 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-9461 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-2017-9461/ (Markdown: https://insights.sbomify.com/CVE-2017-9461/index.md)
An attacker can cause a denial of service in Samba by triggering an infinite loop via dangling symlinks, leading to high resource consumption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-9461?
CVE-2017-9461 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 6 Jun 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.
Weakness: CWE-835
Which versions are affected by CVE-2017-9461?
It affects 8 products.
Linux distribution packages (40)
libsmbclient Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
libsmbclient-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
libwbclient Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
libwbclient-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-client Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-client-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-common Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-common-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-common-tools Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-dc Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-dc-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-krb5-printing Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-pidl Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-python Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-test Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-test-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-vfs-glusterfs Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-winbind Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-winbind-clients Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-winbind-krb5-locator Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
samba-winbind-modules Red Hat:enterprise_linux:7::client | All versions | 0:4.6.2-8.el7 |
libsmbclient Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
libsmbclient-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
libwbclient Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
libwbclient-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-client Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-client-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-common Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-common-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-common-tools Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-dc Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-dc-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
samba-krb5-printing Red Hat:enterprise_linux:7::computenode | All versions | 0:4.6.2-8.el7 |
Products include Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus and 2 more.
How do I fix CVE-2017-9461?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-9461 being exploited?
There is no known exploitation of CVE-2017-9461 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-9461, ECHO-ebb3-4541-c7bc, GHSA-p3px-2xx5-xmgx, RHSA-2017:1950, UBUNTU-CVE-2017-9461, USN-3348-1.