Information disclosure in Symantec Proxysg Firmware
CVE-2015-4334
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.033 (88.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1032149 (VDB Entry, Third Party Advisory, vdb-entry)
- twitter.com/bugch3ck/status/591492380294979585 (Third Party Advisory)
- bto.bluecoat.com/security-advisory/sa93 (Vendor Advisory)
Frequently asked questions
- What is CVE-2015-4334?
- CVE-2015-4334 is a vulnerability in Symantec Proxysg Firmware, classified under Information Disclosure. Published 2015-12-07.
- Is CVE-2015-4334 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.