Bug 1288451 (CVE-2015-7540) - CVE-2015-7540 samba: DoS to AD-DC due to insufficient checking of asn1 memory allocation
Summary: CVE-2015-7540 samba: DoS to AD-DC due to insufficient checking of asn1 memory...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-7540
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: 1290708 1290709 1290710 1290711 1290727 1292069
Blocks: 1281327 1288454
TreeView+ depends on / blocked
 
Reported: 2015-12-04 09:40 UTC by Adam Mariš
Modified: 2021-06-01 15:34 UTC (History)
16 users (show)

Fixed In Version: samba 4.1.22, samba 4.2.0
Doc Type: Bug Fix
Doc Text:
A denial of service flaw was found in the LDAP server provided by the AD DC in the Samba process daemon. A remote attacker could exploit this flaw by sending a specially crafted packet, which could cause the server to consume an excessive amount of memory and crash.
Clone Of:
Environment:
Last Closed: 2016-01-08 12:19:12 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:0006 0 normal SHIPPED_LIVE Moderate: samba security update 2016-01-08 06:39:15 UTC
Red Hat Product Errata RHSA-2016:0010 0 normal SHIPPED_LIVE Moderate: samba4 security update 2016-01-08 03:43:17 UTC
Red Hat Product Errata RHSA-2016:0015 0 normal SHIPPED_LIVE Moderate: samba security update 2016-01-08 15:18:26 UTC

Description Adam Mariš 2015-12-04 09:40:33 UTC 
A denial-of-service vulnerability for the AD-DC due to insuffiecient checking on asn1 memory allocation was reported.

Upstream bug:

https://bugzilla.samba.org/show_bug.cgi?id=9187
Comment 5 Siddharth Sharma 2015-12-16 12:08:58 UTC 
Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1292069]
Comment 6 Huzaifa S. Sidhpurwala 2015-12-17 04:10:41 UTC 
External References:

https://www.samba.org/samba/security/CVE-2015-7540.html
Comment 7 Tomas Hoger 2015-12-17 15:34:30 UTC 
Upstream fixes as applied to 4.1.22:

https://git.samba.org/?p=samba.git;a=commitdiff;h=530d50a1abdcdf4d1775652d4c456c1274d83d8d
https://git.samba.org/?p=samba.git;a=commitdiff;h=9d989c9dd7a5b92d0c5d65287935471b83b6e884

Upstream advisory also indicates that newer samba versions (4.2+) were already fixed in Sep 2014.
Comment 9 errata-xmlrpc 2016-01-07 17:06:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0010 https://rhn.redhat.com/errata/RHSA-2016-0010.html
Comment 10 errata-xmlrpc 2016-01-08 01:40:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0006 https://rhn.redhat.com/errata/RHSA-2016-0006.html
Comment 11 errata-xmlrpc 2016-01-08 10:19:41 UTC 
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.1 for RHEL 6

Via RHSA-2016:0015 https://rhn.redhat.com/errata/RHSA-2016-0015.html
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