Bug 1277337 (CVE-2015-4515) - CVE-2015-4515 Mozilla: Information disclosure through NTLM authentication (MFSA 2015-117)
Summary: CVE-2015-4515 Mozilla: Information disclosure through NTLM authentication (MF...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-4515
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1275590
TreeView+ depends on / blocked
 
Reported: 2015-11-03 05:42 UTC by Huzaifa S. Sidhpurwala
Modified: 2019-09-29 13:39 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-04 04:57:11 UTC


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Description Huzaifa S. Sidhpurwala 2015-11-03 05:42:05 UTC
Security researcher Tim Brown reported that Firefox discloses the hostname and possibly the Windows domain through NTLM-based HTTP authentication when sending type 3 messages as part of the authentication exchange. This is because the Workstation field is populated with the hostname of the system making the request. An attacker can craft a malicious page to send a silent NTLM request that will disclose the information without visibility in the client, leading to information disclosure. This is mitigated because NTLM v1 is disabled by default configurations. 


External Reference:

https://www.mozilla.org/security/announce/2015/mfsa2015-117.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Tim Brown  as the original reporter.

Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.


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