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CVE-1999-1357

7.5 · HIGH

Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and the 0x9b character to a ">" sign, which could a…

Published Oct 5, 1999netscapeEPSS 2.04%

Overview

CVE-1999-1357 is a high-severity vulnerability affecting netscape communicator. It was published on October 5, 1999 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 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

Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and the 0x9b character to a ">" sign, which could allow remote attackers to attack other clients via cross-site scripting (CSS) in CGI programs that do not filter these characters.

Remediation

Check the references section for vendor advisories and patches from netscape. Update communicator 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
netscapecommunicator0Affected

References

Refmarc.info/?l=bugtraq&m=93915331626185&w=2Refmarc.info/?l=bugtraq&m=93915331626185&w=2

How CyberStrike helps

Frequently asked questions

What is CVE-1999-1357?

CVE-1999-1357 is a high-severity vulnerability affecting netscape communicator. It was published on October 5, 1999 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-1999-1357?

This vulnerability has a CVSS 2.0 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-1999-1357?

Check the references section for vendor advisories and patches from netscape. Update communicator 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-1999-1357?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-1999-1357 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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