Bug 1610645 (CVE-2018-10919) - CVE-2018-10919 samba: Confidential attribute disclosure via substring search
Summary: CVE-2018-10919 samba: Confidential attribute disclosure via substring search
Status: NEW
Alias: CVE-2018-10919
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20180816,repor...
Keywords: Security
Depends On: 1617914 1612808 1617911 1618620 1618621
Blocks: 1610646
TreeView+ depends on / blocked
 
Reported: 2018-08-01 05:34 UTC by Sam Fowler
Modified: 2018-11-06 21:34 UTC (History)
30 users (show)

Fixed In Version: samba 4.6.16, samba 4.7.9, samba 4.8.4
Doc Type: If docs needed, set a value
Doc Text:
The Samba Active Directory LDAP server was vulnerable to an information disclosure flaw because of missing access control checks. An authenticated attacker could use this flaw to extract confidential attribute values using LDAP search expressions.
Story Points: ---
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Last Closed:
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Regression: ---
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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Description Sam Fowler 2018-08-01 05:34:54 UTC
When using custom LDAP attributes, Samba seems to recognize the searchFlags confidential flag on custom attributes and hides them from all non-admin users. However, the values of the attributes can still be guessed efficiently by brute forcing them one character after another in a wildcard search query.

Comment 2 Sam Fowler 2018-08-16 03:41:43 UTC
External Reference:

https://www.samba.org/samba/security/CVE-2018-10919.html

Comment 3 Sam Fowler 2018-08-16 07:13:27 UTC
Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1617911]

Comment 5 Huzaifa S. Sidhpurwala 2018-08-17 05:49:06 UTC
Acknowledgments:

Name: Phillip Kuhrt (the Samba project)


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