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CVE-2015-7540

7.5 · HIGH

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…

Published Dec 29, 2015sambaCWE-399EPSS 7.12%

Overview

CVE-2015-7540 is a high-severity vulnerability affecting samba samba. It was published on December 29, 2015 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from samba. Update samba to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
sambasamba>= 4.0.0, < 4.1.22Affected

References

Reflists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlReflists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlRefwww.debian.org/security/2016/dsa-3433Refwww.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlRefwww.securityfocus.com/bid/79736Refwww.securitytracker.com/id/1034492Refwww.ubuntu.com/usn/USN-2855-1Refwww.ubuntu.com/usn/USN-2855-2Refbugzilla.redhat.com/show_bug.cgi?id=1288451

How CyberStrike helps

Frequently asked questions

What is CVE-2015-7540?

CVE-2015-7540 is a high-severity vulnerability affecting samba samba. It was published on December 29, 2015 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2015-7540?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-7540?

Check the references section for vendor advisories and patches from samba. Update samba to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-7540?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-7540 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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