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CVE-1999-1156

5.0 · MEDIUM

BisonWare FTP Server 4.1 and earlier allows remote attackers to cause a denial of service via a malformed PORT command that contains a non-numeric character and a large number of carriage returns.

Published May 17, 1999bisonwareEPSS 1.27%

Overview

CVE-1999-1156 is a medium-severity vulnerability affecting bisonware bisonware_ftp_server. It was published on May 17, 1999 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

BisonWare FTP Server 4.1 and earlier allows remote attackers to cause a denial of service via a malformed PORT command that contains a non-numeric character and a large number of carriage returns.

Remediation

Check the references section for vendor advisories and patches from bisonware. Update bisonware_ftp_server 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
bisonwarebisonware_ftp_server0Affected

References

Refexchange.xforce.ibmcloud.com/vulnerabilities/2254Refexchange.xforce.ibmcloud.com/vulnerabilities/2254

How CyberStrike helps

Frequently asked questions

What is CVE-1999-1156?

CVE-1999-1156 is a medium-severity vulnerability affecting bisonware bisonware_ftp_server. It was published on May 17, 1999 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-1999-1156?

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-1999-1156?

Check the references section for vendor advisories and patches from bisonware. Update bisonware_ftp_server 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-1999-1156?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-1999-1156 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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