CVE-2015-4334

Name: CVE-2015-4334
Creator: NVD / NIST
Published: 2015-12-07T20:59:05.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.33%

Last modified Jun 17, 2026

CVE-2015-4334 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.33% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

3.33%

87.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Symantec	Proxysg Firmware	>= 6.2, <= 6.2.16.4
Symantec	Proxysg Firmware	>= 6.5, <= 6.5.7.0
Symantec	Proxysg Firmware	>= 6.6, <= 6.6.2.0

References

http://www.securitytracker.com/id/1032149Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa93Vendor Advisory
https://twitter.com/bugch3ck/status/591492380294979585Third Party Advisory
http://www.securitytracker.com/id/1032149Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa93Vendor Advisory
https://twitter.com/bugch3ck/status/591492380294979585Third Party Advisory

Timeline

Published: Dec 7, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-4334?

How severe is CVE-2015-4334?

Severity scoring for CVE-2015-4334 is pending analysis. The EPSS model estimates a 3.33% probability of exploitation in the next 30 days.

How do I fix CVE-2015-4334?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-4334?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST