Bug 795509 - (CVE-2012-0870) CVE-2012-0870 samba: Any Batched ("AndX") request processing infinite recursion and heap-based buffer overflow
CVE-2012-0870 samba: Any Batched ("AndX") request processing infinite recursi...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
urgent Severity urgent
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Assigned To: Red Hat Product Security
impact=critical,public=20120221,repor...
: Security
Depends On: 795719 795717 795718 796133 796134
Blocks: 795554
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Reported: 2012-02-20 13:33 EST by Jan Lieskovsky
Modified: 2015-12-14 11:29 EST (History)
10 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-02-24 08:35:29 EST
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RHEL 7.3 requirements from Atomic Host:


Attachments (Terms of Use)
Proposed upstream patch against the v3.0 version (2.83 KB, patch)
2012-02-20 14:01 EST, Jan Lieskovsky
no flags Details | Diff

  None (edit)
Description Jan Lieskovsky 2012-02-20 13:33:48 EST
A flaw was found in the way Samba handled Any Batched (AndX) request packets. A malicious request could cause smbd to enter an infinite recursion and overflow heap-based buffer during recursive calls. This can be triggered by an unauthenticated attacker, resulting in smbd child process crash or possibly code execution.
Comment 1 Jan Lieskovsky 2012-02-20 14:01:45 EST
Created attachment 564503 [details]
Proposed upstream patch against the v3.0 version
Comment 4 Jan Lieskovsky 2012-02-20 16:05:23 EST
This issue affects the versions of the samba package, as shipped with Red Hat Enterprise Linux 4 and 5.

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This issue did NOT affect the versions of the samba and samba4x package, as shipped with Red Hat Enterprise Linux 6.

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This issue did NOT affect the versions of the samba package, as shipped with Fedora release of 15 and 16.
Comment 13 Huzaifa S. Sidhpurwala 2012-02-22 00:16:48 EST
This is public via:

http://btsc.webapps.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB29565
Comment 16 Jan Lieskovsky 2012-02-22 10:46:04 EST
Acknowledgements:


Red Hat would like to thank the Samba team for reporting this issue.
Upstream acknowledges Andy Davis of NGS Secure as the original reporter.
Comment 17 errata-xmlrpc 2012-02-23 15:24:54 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4
  Red Hat Enterprise Linux 5.6 EUS - Server Only
  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 5.3 Long Life

Via RHSA-2012:0332 https://rhn.redhat.com/errata/RHSA-2012-0332.html
Comment 18 Jan Lieskovsky 2012-02-24 04:55:15 EST
Upstream advisory:
http://www.samba.org/samba/security/CVE-2012-0870
Comment 19 Jan Lieskovsky 2012-02-24 08:02:40 EST
Statement:

This issue did not affect samba3x packages as shipped with Red Hat Enterprise Linux 5 and samba packages as shipped with Red Hat Enterprise Linux 6, as it only affected Samba versions prior to 3.4.0. This issue was addressed in samba packages in Red Hat Enterprise Linux 4 and 5 via RHSA-2012:0332.
Comment 20 Jan Lieskovsky 2012-02-24 08:33:45 EST
External Reference:

http://www.samba.org/samba/security/CVE-2012-0870

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