CVE-2015-7540 Denial of service in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2015-7540 and fix it if it is affected.
What it is: CVE-2015-7540 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 29 Dec 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-7540 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-2015-7540/ (Markdown: https://insights.sbomify.com/CVE-2015-7540/index.md)
Remote attackers can crash the Samba LDAP server and consume memory via crafted packets due to unchecked ASN.1 allocation failures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-7540?
CVE-2015-7540 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 29 Dec 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The LDAP server in the AD domain controller in Samba 4.x before 4.1.22 does not check return values to ensure successful ASN.1 memory allocation, which allows remote attackers to cause a denial of service (memory consumption and daemon crash) via crafted packets.
Weakness: CWE-399
Which versions are affected by CVE-2015-7540?
It affects 3 products.
Linux distribution packages (40)
libsmbclient Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
libsmbclient-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
libwbclient Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
libwbclient-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-client Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-client-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-common Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-common-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-common-tools Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-dc Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-dc-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-pidl Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-python Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-test Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-test-devel Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-test-libs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-vfs-glusterfs Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-winbind Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-winbind-clients Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-winbind-krb5-locator Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
samba-winbind-modules Red Hat:enterprise_linux:7::client | All versions | 0:4.2.3-10.el7 |
libsmbclient Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
libsmbclient-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
libwbclient Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
libwbclient-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-client Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-client-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-common Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-common-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-common-tools Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-dc Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-dc-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
samba-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.3-10.el7 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Samba Samba.
How do I fix CVE-2015-7540?
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-2015-7540 being exploited?
There is no known exploitation of CVE-2015-7540 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2015-7540, ECHO-7de7-b7c6-5613, GHSA-7m2w-hp2f-cmqp, RHBA-2015:2258, UBUNTU-CVE-2015-7540.