Opera未明安全漏洞

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漏洞ID 1175270 漏洞类型 输入验证错误
发布时间 2011-09-19 更新时间 2019-07-16
CVE编号 CVE-2011-3389 CNNVD-ID CNNVD-201109-059
漏洞平台 N/A CVSS评分 4.3
|漏洞来源
https://www.securityfocus.com/bid/49778
https://cxsecurity.com/issue/WLB-2012090122
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-201109-059
|漏洞详情
Opera是挪威欧朋(Opera Software)公司所开发的一款Web浏览器,它支持多窗口浏览、可定制用户界面等。 Opera 11.51之前版本中存在未明安全漏洞,该漏洞具有未知攻击向量和“low severity”影响。
|漏洞EXP
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Hash: SHA1


ESA-2012-032: RSA BSAFE Micro Edition Suite Security Update for BEAST (Browser Exploit Against SSL/TLS) attacks

EMC Identifier: ESA-2012-032

CVE Identifier: CVE-2011-3389

Severity Rating: CVSS v2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:P/I:N/A:N)


Affected Products:

All versions of RSA BSAFE Micro Edition Suite prior to 4.0, all platforms


Unaffected Products:

RSA BSAFE Micro Edition Suite 4.0 and higher


Summary:

RSA BSAFE Micro Edition Suite contains updates designed to prevent BEAST attacks (CVE-2011-3389)



Details:

There is a known vulnerability in SSLv3 and TLS v1.0 to do with how the Initialization Vector (IV) is generated. For symmetric key algorithms in CBC mode, the IV for the first record is generated using keys and secrets set during the SSL or TLS handshake. All subsequent records are encrypted using the ciphertext block from the previous record as the IV. With symmetric key encryption in CBC mode, plain text encrypted with the same IV and key generates the same cipher text, which is why having a variable IV is important.

The BEAST exploit uses this SSLv3 and TLS v1.0 vulnerability by allowing an attacker to observe the last ciphertext block, which is the IV, then replace this with an IV of their choice, inject some of their own plain text data, and when this new IV is used to encrypt the data, the attacker can guess the plain text data one byte at a time.



Recommendation:

The best way to help prevent this attack is to use TLS v1.1 or higher. The vulnerability to do with IV generation was fixed in TLS v1.1 (released in 2006) so implementations using only TLS v1.1 or v1.2 are engineered to be secure against the BEAST exploit. However, support for these higher level protocols is limited to a smaller number of applications, so supporting only TLS v1.1 or v1.2 might cause interoperability issues.

A second solution is to limit the negotiated cipher suites to exclude those that do not require symmetric key algorithms in CBC mode. However, this substantially restricts the number of cipher suites that can be negotiated. That is, only cipher suites with NULL encryption or cipher suites with streaming encryption algorithms (the RC4 algorithm) could be negotiated, which might result in reduced security.

For customers who cannot or should not implement either of these two methods, RSA BSAFE Micro Edition Suite 4.0 introduces a new feature called first block splitting. First block splitting prevents the BEAST exploit by introducing unknown data into the encryption scheme prior to the attackers inserted plain text data. This is done as follows: 

1. The first plain text block to be encrypted is split into two blocks. The first block contains the first byte of the data, the second block contains the rest.
2. A MAC is generated from the one byte of data, the MAC key, and an increasing counter. This MAC is included in the first block.
3. The one byte of data, along with the MAC, is encrypted and becomes the IV for the next block. Because the IV is now essentially random data, it is impossible for an attacker to predict it and replace it with one of their own.
To implement first block splitting in RSA BSAFE Micro Edition Suite 4.0, either for an SSL context or SSL object, call R_SSL_CTX_set_options_by_type() or R_SSL_set_options_by_type() respectively, with the SSL_OP_TYPE_SECURITY option type and the SSL_OP_SPLIT_FIRST_FRAGMENT identifier.

For more information about these functions and identifiers, see the RSA BSAFE Micro Edition Suite API Reference Guide.



Severity Rating:

For an explanation of Severity Ratings, refer to the Knowledge Base Article, Security Advisories Severity Rating at https://knowledge.rsasecurity.com/scolcms/knowledge.aspx?solution=a46604. RSA recommends all customers take into account both the base score and any relevant temporal and environmental scores which may impact the potential severity associated with particular security vulnerability.


Obtaining Documentation:

To obtain RSA documentation, log on to RSA SecurCare Online at https://knowledge.rsasecurity.com and click Products in the top navigation menu. Select the specific product whose documentation you want to obtain. Scroll to the section for the product version that you want and click the set link.



Obtaining More Information:

For more information about RSA BSAFE, visit the RSA web site at http://www.rsa.com/node.aspx?id=1204.



Getting Support and Service:

For customers with current maintenance contracts, contact your local RSA Customer Support center with any additional questions regarding this RSA SecurCare Note. For contact telephone numbers or e-mail addresses, log on to RSA SecurCare Online at https://knowledge.rsasecurity.com, click Help & Contact, and then click the Contact Us - Phone tab or the Contact Us - Email tab.


General Customer Support Information:

http://www.rsa.com/node.aspx?id=1264


RSA SecurCare Online:

https://knowledge.rsasecurity.com


EOPS Policy:

RSA has a defined End of Primary Support policy associated with all major versions. Please refer to the link below for additional details. 
http://www.rsa.com/node.aspx?id=2575


SecurCare Online Security Advisories

RSA, The Security Division of EMC, distributes SCOL Security Advisories in order to bring to the attention of users of the affected RSA products important security information. RSA recommends that all users determine the applicability of this information to their individual situations and take appropriate action. The information set forth herein is provided "as is" without warranty of any kind. RSA disclaim all warranties, either express or implied, including the warranties of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall RSA or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if RSA or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.


About RSA SecurCare Notes & Security Advisories Subscription

RSA SecurCare Notes & Security Advisories are targeted e-mail messages that RSA sends you based on the RSA product family you currently use. If youd like to stop receiving RSA SecurCare Notes & Security Advisories, or if youd like to change which RSA product family Notes & Security Advisories you currently receive, log on to RSA SecurCare Online at https://knowledge.rsasecurity.com/scolcms/help.aspx?_v=view3. Following the instructions on the page, remove the check mark next to the RSA product family whose Notes & Security Advisories you no longer want to receive. Click the Submit button to save your selection.


EMC Product Security Response Center

Security_Alert@EMC.COM

http://www.emc.com/contact-us/contact/product-security-response-center.html

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|受影响的产品
VMWare VirtualCenter 2.5 Update 6b VMWare Update Manager 5.0 Update 1 Sun JRE (Windows Production Release) 1.5.0_32 Sun JRE (Solaris Production Release) 1.5.0_32 Sun JRE (Linux Production Release) 1.5.0_32 Sun JDK (Windows Production Release) 1.5.0_
|参考资料

来源:SECTRACK
名称:1025997
链接:http://www.securitytracker.com/id?1025997
来源:BID
名称:49388
链接:http://www.securityfocus.com/bid/49388
来源:www.opera.com
链接:http://www.opera.com/docs/changelogs/windows/1151/
来源:www.opera.com
链接:http://www.opera.com/docs/changelogs/unix/1151/
来源:www.opera.com
链接:http://www.opera.com/docs/changelogs/mac/1151/
来源:SECUNIA
名称:45791
链接:http://secunia.com/advisories/45791
来源:OSVDB
名称:74829
链接:http://osvdb.org/74829
来源:NSFOCUS
名称:17825
链接:http://www.nsfocus.net/vulndb/17825
来源:NSFOCUS
名称:19096
链接:http://www.nsfocus.net/vulndb/19096
来源:NSFOCUS
名称:19032
链接:http://www.nsfocus.net/vulndb/19032
来源:NSFOCUS
名称:18696
链接:http://www.nsfocus.net/vulndb/18696
来源:NSFOCUS
名称:20174
链接:http://www.nsfocus.net/vulndb/20174
来源:NSFOCUS
名称:19819
链接:http://www.nsfocus.net/vulndb/19819
来源:NSFOCUS
名称:20684
链接:http://www.nsfocus.net/vulndb/20684
来源:NSFOCUS
名称:20683
链接:http://www.nsfocus.net/vulndb/20683
来源:NSFOCUS
名称:20539
链接:http://www.nsfocus.net/vulndb/20539