CVE-2016-2119 Security feature bypass in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2016-2119 and fix it if it is affected.
What it is: CVE-2016-2119 is a high-severity vulnerability in Samba Samba, published on 7 Jul 2016. 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-2016-2119 in the wild and no public exploit code.
Affected product: Samba Samba. 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-2016-2119/ (Markdown: https://insights.sbomify.com/CVE-2016-2119/index.md)
Man-in-the-middle attackers can bypass SMB client signing to spoof servers, affecting Samba deployments.
- 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-2016-2119?
CVE-2016-2119 is a high-severity vulnerability in Samba Samba, published on 7 Jul 2016. 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
libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.
Weakness: CWE-94
Which versions are affected by CVE-2016-2119?
It affects 1 product.
Linux distribution packages (40)
samba4 Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-client Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-common Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-dc Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-dc-libs Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-debuginfo Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-devel Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-libs Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-pidl Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-python Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-test Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind-clients Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind-krb5-locator Red Hat:enterprise_linux:6::client | All versions | 0:4.2.10-7.el6_8 |
samba4 Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-client Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-common Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-dc Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-dc-libs Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-devel Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-libs Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-pidl Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-python Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-test Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind-clients Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind-krb5-locator Red Hat:enterprise_linux:6::computenode | All versions | 0:4.2.10-7.el6_8 |
samba4 Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-client Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-common Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-dc Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-dc-libs Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-devel Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-libs Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-pidl Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-python Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-test Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
samba4-winbind Red Hat:enterprise_linux:6::server | All versions | 0:4.2.10-7.el6_8 |
Products include Samba Samba.
How do I fix CVE-2016-2119?
Upgrade to a fixed version.
Is CVE-2016-2119 being exploited?
There is no known exploitation of CVE-2016-2119 in the wild and no public exploit code.
Other vulnerabilities in Samba Samba
Sources
Also known as DEBIAN-CVE-2016-2119, ECHO-50ea-9c50-68b5, GHSA-6hfw-45v2-4p3j, RHSA-2016:1486, RHSA-2016:1487, RHSA-2016:1494 and 4 more.