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AUSCERT External Security Bulletin Redistribution
ESB-2016.2885
Security Bulletin: Vulnerabilities in OpenSSL affects IBM Rational
ClearCase (CVE-2016-2177, CVE-2016-2178, CVE-2016-2183, CVE-2016-6302,
CVE-2016-6303, CVE-2016-6304, CVE-2016-6306)
8 December 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Rational ClearCase
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Solaris
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-6306 CVE-2016-6304 CVE-2016-6303
CVE-2016-6302 CVE-2016-2183 CVE-2016-2178
CVE-2016-2177
Reference: ASB-2016.0098
ASB-2016.0095
ESB-2016.2881
ESB-2016.2782
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg21993514
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Security Bulletin: Vulnerabilities in OpenSSL affects IBM Rational ClearCase
(CVE-2016-2177, CVE-2016-2178, CVE-2016-2183, CVE-2016-6302, CVE-2016-6303,
CVE-2016-6304, CVE-2016-6306)
Security Bulletin
Document information
More support for:
Rational ClearCase
Perl: ratlperl
Software version:
7.1, 7.1.0.1, 7.1.0.2, 7.1.1, 7.1.1.1, 7.1.1.2, 7.1.1.3, 7.1.1.4, 7.1.1.5,
7.1.1.6, 7.1.1.7, 7.1.1.8, 7.1.1.9, 7.1.2, 7.1.2.1, 7.1.2.2, 7.1.2.3, 7.1.2.4,
7.1.2.5, 7.1.2.6, 7.1.2.7, 7.1.2.8, 7.1.2.9, 7.1.2.10, 7.1.2.11, 7.1.2.12,
7.1.2.13, 7.1.2.14, 7.1.2.15, 7.1.2.16, 7.1.2.17, 7.1.2.18, 7.1.2.19, 8.0,
8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.7, 8.0.0.8,
8.0.0.9, 8.0.0.10, 8.0.0.11, 8.0.0.12, 8.0.0.13, 8.0.0.14, 8.0.0.15, 8.0.0.16,
8.0.0.17, 8.0.0.18, 8.0.0.19, 8.0.1, 8.0.1.1, 8.0.1.2, 8.0.1.3, 8.0.1.4,
8.0.1.5, 8.0.1.6, 8.0.1.7, 8.0.1.8, 8.0.1.9, 8.0.1.10, 8.0.1.11, 8.0.1.12,
9.0, 9.0.0.1, 9.0.0.2
Operating system(s):
AIX, HP-UX, Linux, Solaris, Windows
Reference #:
1993514
Modified date:
07 December 2016
Summary
OpenSSL vulnerabilities were disclosed on September 22 and 26, 2016 by the
OpenSSL Project. OpenSSL is used by IBM Rational ClearCase. IBM Rational
ClearCase has addressed the applicable CVEs.
Vulnerability Details
CVEID:
CVE-2016-2177
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the
incorrect use of pointer arithmetic for heap-buffer boundary checks. By
leveraging unexpected malloc behavior, a remote attacker could exploit this
vulnerability to trigger an integer overflow and cause the application to
crash.
CVSS Base Score:
5.9
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/113890 for the current
score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID:
CVE-2016-2178
DESCRIPTION:
OpenSSL could allow a remote attacker to obtain sensitive information, caused
by an error in the DSA implementation that allows the following of a
non-constant time codepath for certain operations. An attacker could exploit
this vulnerability using a cache-timing attack to recover the private DSA key.
CVSS Base Score:
5.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/113889 for the
current score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVEID:
CVE-2016-2183
DESCRIPTION:
OpenSSL could allow a remote attacker to obtain sensitive information, caused
by an error in the in the Triple-DES on 64-bit block cipher, used as a part of
the SSL/TLS protocol. By capturing large amounts of encrypted traffic between
the SSL/TLS server and the client, a remote attacker able to conduct a
man-in-the-middle attack could exploit this vulnerability to recover the
plaintext data and obtain sensitive information. This vulnerability is known
as the SWEET32 Birthday attack.
CVSS Base Score:
3.7
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/116337 for the current
score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVEID:
CVE-2016-6302
DESCRIPTION:
OpenSSL is vulnerable to a denial of service, caused by the failure to
consider the HMAC size during validation of the ticket length by the
tls_decrypt_ticket function A remote attacker could exploit this vulnerability
using a ticket that is too short to cause a denial of service.
CVSS Base Score:
5.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/117024 for the current
score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID:
CVE-2016-6303
DESCRIPTION:
OpenSSL is vulnerable to a denial of service, caused by an integer overflow in
the MDC2_Update function. By using unknown attack vectors, a remote attacker
could exploit this vulnerability to trigger an out-of-bounds write and cause
the application to crash.
CVSS Base Score:
5.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/117023 for the current
score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID:
CVE-2016-6304
DESCRIPTION:
OpenSSL is vulnerable to a denial of service, caused by multiple memory leaks
in t1_lib.c during session renegotiation. By sending an overly large OCSP
Status Request extension, a remote attacker could exploit this vulnerability
to consume all available memory resources.
CVSS Base Score:
7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/117110 for the current
score
CVSS Environmental Score*:
Undefined CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID:
CVE-2016-6306
DESCRIPTION:
OpenSSL is vulnerable to a denial of service, caused by missing message length
checks when parsing certificates. A remote authenticated attacker could
exploit this vulnerability to trigger an out-of-bounds read and cause a denial
of service.
CVSS Base Score:
4.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/117112 for the current
score
CVSS Environmental Score*:
Undefined
CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) Affected Products and Versions
IBM Rational ClearCase versions:
Version Status
9.0 through 9.0.0.2 Affected
8.0.1 through 8.0.1.12 Affected
8.0 through 8.0.0.19 Affected
7.1.0.x, 7.1.1.x, 7.1.2.x (all versions) Affected
Not all deployments of Rational ClearCase use OpenSSL in a way that is
affected by these vulnerabilities.
You are vulnerable if your use of Rational ClearCase includes any of these
configurations: 1. You use the base ClearCase/ClearQuest integration client on
any platform, configured to use SSL to communicate with a ClearQuest server.
2. You use the UCM/ClearQuest integration on UNIX/Linux clients, configured to
use SSL to communicate with a ClearQuest server. Note: Windows clients using
the UCM/ClearQuest integration are not vulnerable. 3. On UNIX/Linux clients,
you use the Change Management Integration (CMI) for base ClearCase with
ClearQuest or Rational Team Concert (RTC), or for UCM with ClearQuest or RTC,
or for Jira, when configured to use SSL to communicate with the server. Note:
Windows clients using the CMI integration are not vulnerable. 4. You use
ratlperl, ccperl, or cqperl to run your own perl scripts, and those scripts
use SSL connections.
Remediation/Fixes
Apply a fix pack as listed in the table below. The fix pack includes OpenSSL
1.0.2j.
Affected Versions Applying the fix
9.0 through 9.0.0.2 Install Rational ClearCase Fix Pack 3 (9.0.0.3) for 9.0
8.0.1 through 8.0.1.12 Install Rational ClearCase Fix Pack 13 (8.0.1.13) for 8.0.1
8.0 through 8.0.0.19 Install Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
7.1.2.x (all fix packs)
7.1.1.x (all fix packs) Customers on extended support contracts should contact
7.1.0.x (all fix packs) Customer Support for information.
For 7.0.x, 7.1.x and earlier releases, IBM recommends upgrading to a fixed,
supported version/release/platform of the product.
Workarounds and Mitigations
None
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Important note
IBM strongly suggests that all System z customers be subscribed to the System
z Security Portal to receive the latest critical System z security and
integrity service. If you are not subscribed, see the instructions on the
System z Security web site. Security and integrity APARs and associated fixes
will be posted to this portal. IBM suggests reviewing the CVSS scores and
applying all security or integrity fixes as soon as possible to minimize any
potential risk.
References
Complete CVSS v3 Guide
On-line Calculator v3
OpenSSL Project vulnerability website
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
* 7 December 2016: Original version published
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin. Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
Cross reference information
Segment Product Component Platform Version Edition
Software Rational Integrations: AIX, 7.1, 7.1.0.1, 7.1.0.2,
Development ClearQuest IBM HP-UX, 7.1.1, 7.1.1.1, 7.1.1.2,
Linux, 7.1.1.3, 7.1.1.4, 7.1.1.5,
Solaris, 7.1.1.6, 7.1.1.7, 7.1.1.8,
Windows 7.1.1.9, 7.1.2, 7.1.2.1,
7.1.2.10, 7.1.2.11, 7.1.2.12,
7.1.2.13, 7.1.2.14, 7.1.2.15,
7.1.2.16, 7.1.2.17, 7.1.2.18,
7.1.2.19, 7.1.2.2, 7.1.2.3,
7.1.2.4, 7.1.2.5, 7.1.2.6,
7.1.2.7, 7.1.2.8, 7.1.2.9,
8.0, 8.0.0.1, 8.0.0.10,
8.0.0.11, 8.0.0.12 8.0.0.13,
8.0.0.14, 8.0.0.15, 8.0.0.16,
8.0.0.17, 8.0.0.18, 8.0.0.19,
8.0.0.2, 8.0.0.3, 8.0.0.4,
8.0.0.5, 8.0.0.6, 8.0.0.7,
8.0.0.8, 8.0.0.9, 8.0.1,
8.0.1.1, 8.0.1.10, 8.0.1.11,
8.0.1.12, 8.0.1.2, 8.0.1.3,
8.0.1.4, 8.0.1.5, 8.0.1.6,
8.0.1.7, 8.0.1.8, 8.0.1.9,
9.0, 9.0.0.1, 9.0.0.2
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