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Category:   Application (Security)  >   OpenSSL Vendors:   OpenSSL.org
(Mandrake Issues Fix) Re: OpenSSL Has Multiple Buffer Overflows That Allow Remote Users to Execute Arbitrary Code with Root Privileges
SecurityTracker Alert ID:  1004900
SecurityTracker URL:  http://securitytracker.com/id/1004900
CVE Reference:   CVE-2002-0655, CVE-2002-0656, CVE-2002-0657, CVE-2002-0659   (Links to External Site)
Date:  Jul 31 2002
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.6d or earlier, 0.9.7-beta2 or earlier, 0.9.7 current development snapshots
Description:   Four buffer overflow conditions were reported in OpenSSL. All four may allow a remote user to execute arbitrary code.

The vendor has reported that A.L. Digital Ltd and The Bunker have uncovered multiple buffer overflows in OpenSSL, discovered during a security review.

A remote user could create a specially crafted, oversized client master key and use SSL2 to trigger an overflow on an SSL server. According to the report, this vulnerability was independently discovered by Neohapsis, which has confirmed that the overflow can be exploited to execute arbitrary code.

A remote user with an SSL server could create a specially crafted, oversized session ID and supply this ID to a target client using SSL3 to trigger an overflow.

A remote user could supply a specially crafted, oversized master key to an SSL3 server to trigger an overflow. It is reported that this flaw affects OpenSSL 0.9.7 prior to version 0.9.7-beta3 when Kerberos is enabled.

Several buffers used for ASCII representations of integers are reportedly too small on 64 bit platforms.

The report also states that other potential buffer overflows that are currently considered to be non-exploitable have been discovered.

The vendor notes that Adi Stav and James Yonan independently reported that the ASN1 parser can be confused by certain invalid encodings, potentially allowing a remote user to cause denial of service conditions. An OpenSSL-based application that use the ASN1 library to parse untrusted data (including all SSL or TLS applications using S/MIME [PKCS#7] or certificate generation routines) are affected.

Impact:   A remote user acting as an SSL client could execute arbitrary code on an SSL server. A remote user acting as an SSL server could cause arbitrary code to be executed on an SSL client that is connecting to the server. In each case, the code would run with privileges of the affected implementation.

A remote user may be able cause denial of service conditions.

Solution:   Mandrake has issued a fix.

Linux-Mandrake 7.1:
58faab2dc1c940743311888876580f3f 7.1/RPMS/openssl-0.9.5a-4.1mdk.i586.rpm
61e57b19d2ff472fd77befb1af3dd774 7.1/RPMS/openssl-devel-0.9.5a-4.1mdk.i586.rpm
fac4725e0a9e1cc981c9c86a0bb8eeed 7.1/SRPMS/openssl-0.9.5a-4.1mdk.src.rpm

Linux-Mandrake 7.2:
ff9061b2b2f541cf537c9373df246dbb 7.2/RPMS/openssl-0.9.5a-9.1mdk.i586.rpm
6be8ebdc675e69d788023c834342ed5e 7.2/RPMS/openssl-devel-0.9.5a-9.1mdk.i586.rpm
720b889b1296b6205451a29d888468e1 7.2/SRPMS/openssl-0.9.5a-9.1mdk.src.rpm

Mandrake Linux 8.0:
8f1fd965bfca723a047bfe1d25247586 8.0/RPMS/openssl-0.9.6-8.1mdk.i586.rpm
acf90eb5c7570271e6602e0a9b2f6d8e 8.0/RPMS/openssl-devel-0.9.6-8.1mdk.i586.rpm
dcf49c70aa8b4e5483677be7815dcec5 8.0/SRPMS/openssl-0.9.6-8.1mdk.src.rpm

Mandrake Linux 8.0/ppc:
db709e87bc29baf801f4f2f5ec472636 ppc/8.0/RPMS/openssl-0.9.6-8.1mdk.ppc.rpm
d87e514f22b8fe69d74b84276f4cca80 ppc/8.0/RPMS/openssl-devel-0.9.6-8.1mdk.ppc.rpm
dcf49c70aa8b4e5483677be7815dcec5 ppc/8.0/SRPMS/openssl-0.9.6-8.1mdk.src.rpm

Mandrake Linux 8.1:
d00dbf479e5b5e911038e3da41a8f295 8.1/RPMS/libopenssl0-0.9.6b-1.1mdk.i586.rpm
9f6c4ceb27b063c683f0dd6187ebb29d 8.1/RPMS/libopenssl0-devel-0.9.6b-1.1mdk.i586.rpm
434b7cce94cac8020efdcae76cff7054 8.1/RPMS/openssl-0.9.6b-1.1mdk.i586.rpm
c404beecf05dfed1673b319f80777e65 8.1/SRPMS/openssl-0.9.6b-1.1mdk.src.rpm

Mandrake Linux 8.1/ia64:
9a017cfb42566ffae744dff2d4dcbacc ia64/8.1/RPMS/libopenssl0-0.9.6b-1.1mdk.ia64.rpm
5004ae6259b01f82838843f1e6355297 ia64/8.1/RPMS/libopenssl0-devel-0.9.6b-1.1mdk.ia64.rpm
5de61993432b33b17a67c033a176e240 ia64/8.1/RPMS/openssl-0.9.6b-1.1mdk.ia64.rpm
c404beecf05dfed1673b319f80777e65 ia64/8.1/SRPMS/openssl-0.9.6b-1.1mdk.src.rpm

Mandrake Linux 8.2:
933cb11b417f19a76506f198cb9a0f46 8.2/RPMS/libopenssl0-0.9.6c-2.1mdk.i586.rpm
8f3f65b2ce03ffb0ca4dbacbd4da7d3a 8.2/RPMS/libopenssl0-devel-0.9.6c-2.1mdk.i586.rpm
28f923613fb0c76e9732f99267591a84 8.2/RPMS/openssl-0.9.6c-2.1mdk.i586.rpm
d5e9dd5cb1fdc430723c17030d592d76 8.2/SRPMS/openssl-0.9.6c-2.1mdk.src.rpm

Mandrake Linux 8.2/ppc:
ac161086936d67710ac55c90cb48d904 ppc/8.2/RPMS/libopenssl0-0.9.6c-2.1mdk.ppc.rpm
23495281c79cfb3a10daec883a8d70df ppc/8.2/RPMS/libopenssl0-devel-0.9.6c-2.1mdk.ppc.rpm
033c1b2f03223749ccc4333d4060a818 ppc/8.2/RPMS/openssl-0.9.6c-2.1mdk.ppc.rpm
d5e9dd5cb1fdc430723c17030d592d76 ppc/8.2/SRPMS/openssl-0.9.6c-2.1mdk.src.rpm

Corporate Server 1.0.1:
58faab2dc1c940743311888876580f3f 1.0.1/RPMS/openssl-0.9.5a-4.1mdk.i586.rpm
61e57b19d2ff472fd77befb1af3dd774 1.0.1/RPMS/openssl-devel-0.9.5a-4.1mdk.i586.rpm
fac4725e0a9e1cc981c9c86a0bb8eeed 1.0.1/SRPMS/openssl-0.9.5a-4.1mdk.src.rpm

Single Network Firewall 7.2:
ff9061b2b2f541cf537c9373df246dbb snf7.2/RPMS/openssl-0.9.5a-9.1mdk.i586.rpm
720b889b1296b6205451a29d888468e1 snf7.2/SRPMS/openssl-0.9.5a-9.1mdk.src.rpm

Vendor URL:  www.openssl.org/news/secadv_20020730.txt (Links to External Site)
Cause:   Boundary error, Exception handling error
Underlying OS:  Linux (Mandriva/Mandrake)
Underlying OS Comments:  7.1, 7.2, 8.0, 8.1, 8.2, Corporae Server 1.0.1, Single Network Firewall 7.2

Message History:   This archive entry is a follow-up to the message listed below.
Jul 30 2002 OpenSSL Has Multiple Buffer Overflows That Allow Remote Users to Execute Arbitrary Code with Root Privileges



 Source Message Contents

Subject:  MDKSA-2002:046 - openssl update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           openssl
Advisory ID:            MDKSA-2002:046
Date:                   July 30th, 2002
Affected versions:      7.1, 7.2, 8.0, 8.1, 8.2, Corporate Server 1.0.1,
                        Single Network Firewall 7.2
________________________________________________________________________

Problem Description:

 An audit of the OpenSSL code by A.L. Digital Ltd and The Bunker, under
 the DARPA program CHATS, discovered a number of vulnerabilities in the
 OpenSSL code that are all potentially remotely exploitable.

 From the OpenSSL advisory:

 1. The client master key in SSL2 could be oversized and overrun a
    buffer. This vulnerability was also independently discovered by
    consultants at Neohapsis (http://www.neohapsis.com/) who have also
    demonstrated that the vulerability is exploitable. Exploit code is
    NOT available at this time.

 2. The session ID supplied to a client in SSL3 could be oversized and
    overrun a buffer.

 3. The master key supplied to an SSL3 server could be oversized and
    overrun a stack-based buffer. This issues only affects OpenSSL
    0.9.7 with Kerberos enabled.

 4. Various buffers for ASCII representations of integers were too
    small on 64 bit platforms.

 At the same time, various potential buffer overflows have had
 assertions added; these are not known to be exploitable.  

 Finally, a vulnerability was found by Adi Stav and James Yonan
 independantly in the ASN1 parser which can be confused by supplying it
 with certain invalid encodings.  There are no known exploits for this
 vulnerability.

 All of these vulnerabilities are fixed in OpenSSL 0.9.6f.  Patches have
 been applied to the versions of OpenSSL provided in this update to fix
 all of these problems, except for the ASN1 vulnerability, which a fix
 will be provided for once MandrakeSoft has had a chance to QA the new
 packages.  In the meantime, it is is strongly encouraged that all users
 upgrade to these OpenSSL packages.
________________________________________________________________________

References:

  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0655
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0656
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0657
________________________________________________________________________

Updated Packages:

 Linux-Mandrake 7.1:
 58faab2dc1c940743311888876580f3f  7.1/RPMS/openssl-0.9.5a-4.1mdk.i586.rpm
 61e57b19d2ff472fd77befb1af3dd774  7.1/RPMS/openssl-devel-0.9.5a-4.1mdk.i586.rpm
 fac4725e0a9e1cc981c9c86a0bb8eeed  7.1/SRPMS/openssl-0.9.5a-4.1mdk.src.rpm

 Linux-Mandrake 7.2:
 ff9061b2b2f541cf537c9373df246dbb  7.2/RPMS/openssl-0.9.5a-9.1mdk.i586.rpm
 6be8ebdc675e69d788023c834342ed5e  7.2/RPMS/openssl-devel-0.9.5a-9.1mdk.i586.rpm
 720b889b1296b6205451a29d888468e1  7.2/SRPMS/openssl-0.9.5a-9.1mdk.src.rpm

 Mandrake Linux 8.0:
 8f1fd965bfca723a047bfe1d25247586  8.0/RPMS/openssl-0.9.6-8.1mdk.i586.rpm
 acf90eb5c7570271e6602e0a9b2f6d8e  8.0/RPMS/openssl-devel-0.9.6-8.1mdk.i586.rpm
 dcf49c70aa8b4e5483677be7815dcec5  8.0/SRPMS/openssl-0.9.6-8.1mdk.src.rpm

 Mandrake Linux 8.0/ppc:
 db709e87bc29baf801f4f2f5ec472636  ppc/8.0/RPMS/openssl-0.9.6-8.1mdk.ppc.rpm
 d87e514f22b8fe69d74b84276f4cca80  ppc/8.0/RPMS/openssl-devel-0.9.6-8.1mdk.ppc.rpm
 dcf49c70aa8b4e5483677be7815dcec5  ppc/8.0/SRPMS/openssl-0.9.6-8.1mdk.src.rpm

 Mandrake Linux 8.1:
 d00dbf479e5b5e911038e3da41a8f295  8.1/RPMS/libopenssl0-0.9.6b-1.1mdk.i586.rpm
 9f6c4ceb27b063c683f0dd6187ebb29d  8.1/RPMS/libopenssl0-devel-0.9.6b-1.1mdk.i586.rpm
 434b7cce94cac8020efdcae76cff7054  8.1/RPMS/openssl-0.9.6b-1.1mdk.i586.rpm
 c404beecf05dfed1673b319f80777e65  8.1/SRPMS/openssl-0.9.6b-1.1mdk.src.rpm

 Mandrake Linux 8.1/ia64:
 9a017cfb42566ffae744dff2d4dcbacc  ia64/8.1/RPMS/libopenssl0-0.9.6b-1.1mdk.ia64.rpm
 5004ae6259b01f82838843f1e6355297  ia64/8.1/RPMS/libopenssl0-devel-0.9.6b-1.1mdk.ia64.rpm
 5de61993432b33b17a67c033a176e240  ia64/8.1/RPMS/openssl-0.9.6b-1.1mdk.ia64.rpm
 c404beecf05dfed1673b319f80777e65  ia64/8.1/SRPMS/openssl-0.9.6b-1.1mdk.src.rpm

 Mandrake Linux 8.2:
 933cb11b417f19a76506f198cb9a0f46  8.2/RPMS/libopenssl0-0.9.6c-2.1mdk.i586.rpm
 8f3f65b2ce03ffb0ca4dbacbd4da7d3a  8.2/RPMS/libopenssl0-devel-0.9.6c-2.1mdk.i586.rpm
 28f923613fb0c76e9732f99267591a84  8.2/RPMS/openssl-0.9.6c-2.1mdk.i586.rpm
 d5e9dd5cb1fdc430723c17030d592d76  8.2/SRPMS/openssl-0.9.6c-2.1mdk.src.rpm

 Mandrake Linux 8.2/ppc:
 ac161086936d67710ac55c90cb48d904  ppc/8.2/RPMS/libopenssl0-0.9.6c-2.1mdk.ppc.rpm
 23495281c79cfb3a10daec883a8d70df  ppc/8.2/RPMS/libopenssl0-devel-0.9.6c-2.1mdk.ppc.rpm
 033c1b2f03223749ccc4333d4060a818  ppc/8.2/RPMS/openssl-0.9.6c-2.1mdk.ppc.rpm
 d5e9dd5cb1fdc430723c17030d592d76  ppc/8.2/SRPMS/openssl-0.9.6c-2.1mdk.src.rpm

 Corporate Server 1.0.1:
 58faab2dc1c940743311888876580f3f  1.0.1/RPMS/openssl-0.9.5a-4.1mdk.i586.rpm
 61e57b19d2ff472fd77befb1af3dd774  1.0.1/RPMS/openssl-devel-0.9.5a-4.1mdk.i586.rpm
 fac4725e0a9e1cc981c9c86a0bb8eeed  1.0.1/SRPMS/openssl-0.9.5a-4.1mdk.src.rpm

 Single Network Firewall 7.2:
 ff9061b2b2f541cf537c9373df246dbb  snf7.2/RPMS/openssl-0.9.5a-9.1mdk.i586.rpm
 720b889b1296b6205451a29d888468e1  snf7.2/SRPMS/openssl-0.9.5a-9.1mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.  The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one 
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

  http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig <filename>

All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team from:

  https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to 
update.

You can view other update advisories for Mandrake Linux at:

  http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

  http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security@linux-mandrake.com>


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