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CVE-2015-4334

5.0 · MEDIUM

The default configuration of SGOS in Blue Coat ProxySG before 6.2.16.5, 6.5 before 6.5.7.1, and 6.6 before 6.6.2.1 forwards authentication challenges from upstream origin content servers (OCS) when…

Published Dec 7, 2015symantecCWE-200EPSS 3.33%

Overview

CVE-2015-4334 is a medium-severity vulnerability affecting symantec proxysg_firmware. It was published on December 7, 2015 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

The default configuration of SGOS in Blue Coat ProxySG before 6.2.16.5, 6.5 before 6.5.7.1, and 6.6 before 6.6.2.1 forwards authentication challenges from upstream origin content servers (OCS) when used in an explicit proxy deployment, which makes it easier for remote attackers to obtain sensitive information via a 407 (aka Proxy Authentication Required) HTTP status code, as demonstrated when using NTLM authentication.

Remediation

Check the references section for vendor advisories and patches from symantec. Update proxysg_firmware 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
symantecproxysg_firmware6.2Affected

References

Refwww.securitytracker.com/id/1032149Refbto.bluecoat.com/security-advisory/sa93Reftwitter.com/bugch3ck/status/591492380294979585Refwww.securitytracker.com/id/1032149Refbto.bluecoat.com/security-advisory/sa93Reftwitter.com/bugch3ck/status/591492380294979585

How CyberStrike helps

Frequently asked questions

What is CVE-2015-4334?

CVE-2015-4334 is a medium-severity vulnerability affecting symantec proxysg_firmware. It was published on December 7, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2015-4334?

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-2015-4334?

Check the references section for vendor advisories and patches from symantec. Update proxysg_firmware 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-2015-4334?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-4334 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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