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CVE-2013-4359

5.0 · MEDIUM

Integer overflow in kbdint.c in mod_sftp in ProFTPD 1.3.4d and 1.3.5r3 allows remote attackers to cause a denial of service (memory consumption) via a large response count value in an authenticatio…

Published Sep 30, 2013proftpdCWE-189EPSS 2.99%

Overview

CVE-2013-4359 is a medium-severity vulnerability affecting proftpd proftpd. It was published on September 30, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Integer overflow in kbdint.c in mod_sftp in ProFTPD 1.3.4d and 1.3.5r3 allows remote attackers to cause a denial of service (memory consumption) via a large response count value in an authentication request, which triggers a large memory allocation.

Remediation

Check the references section for vendor advisories and patches from proftpd. Update proftpd 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

References

Refbugs.proftpd.org/show_bug.cgi?id=3973Refkingcope.wordpress.com/2013/09/11/proftpd-mod_sftpmod_sftp_pam-invalid-pool-allocation-in-kbdint-authentication/Reflists.opensuse.org/opensuse-updates/2013-10/msg00032.htmlReflists.opensuse.org/opensuse-updates/2015-06/msg00020.htmlRefwww.debian.org/security/2013/dsa-2767Refwww.openwall.com/lists/oss-security/2013/09/17/6Refbugs.proftpd.org/show_bug.cgi?id=3973Refkingcope.wordpress.com/2013/09/11/proftpd-mod_sftpmod_sftp_pam-invalid-pool-allocation-in-kbdint-authentication/Reflists.opensuse.org/opensuse-updates/2013-10/msg00032.htmlReflists.opensuse.org/opensuse-updates/2015-06/msg00020.html

How CyberStrike helps

Frequently asked questions

What is CVE-2013-4359?

CVE-2013-4359 is a medium-severity vulnerability affecting proftpd proftpd. It was published on September 30, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2013-4359?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-4359?

Check the references section for vendor advisories and patches from proftpd. Update proftpd 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-2013-4359?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-4359 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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