Vulnerability identifier: #VU33689

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-3389

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows man-in-the-middle attackers to obtain plaintext HTTP headers via a blockwise chosen-boundary attack (BCBA) on an HTTPS session, in conjunction with JavaScript code that uses (1) the HTML5 WebSocket API, (2) the Java URLConnection API, or (3) the Silverlight WebClient API, aka a "BEAST" attack.

Mitigation
Install update from vendor's website.

External links
http://blog.mozilla.com/security/2011/09/27/attack-against-tls-protected-communications/
http://blogs.technet.com/b/msrc/archive/2011/09/26/microsoft-releases-security-advisory-2588513.aspx
http://blogs.technet.com/b/srd/archive/2011/09/26/is-ssl-broken-more-about-security-advisory-2588513.aspx
http://curl.haxx.se/docs/adv_20120124B.html
http://downloads.asterisk.org/pub/security/AST-2016-001.html
http://ekoparty.org/2011/juliano-rizzo.php
http://eprint.iacr.org/2004/111
http://eprint.iacr.org/2006/136
http://googlechromereleases.blogspot.com/2011/10/chrome-stable-release.html
http://isc.sans.edu/diary/SSL+TLS+part+3+/11635
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00002.html
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
http://lists.apple.com/archives/security-announce/2012/Jul/msg00001.html
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00049.html
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00051.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
http://marc.info/?l=bugtraq&m=132750579901589&w=2
http://marc.info/?l=bugtraq&m=132872385320240&w=2
http://marc.info/?l=bugtraq&m=133365109612558&w=2
http://marc.info/?l=bugtraq&m=133728004526190&w=2
http://marc.info/?l=bugtraq&m=134254866602253&w=2
http://marc.info/?l=bugtraq&m=134254957702612&w=2
http://my.opera.com/securitygroup/blog/2011/09/28/the-beast-ssl-tls-issue
http://osvdb.org/74829
http://rhn.redhat.com/errata/RHSA-2012-0508.html
http://rhn.redhat.com/errata/RHSA-2013-1455.html
http://secunia.com/advisories/45791
http://secunia.com/advisories/47998
http://secunia.com/advisories/48256
http://secunia.com/advisories/48692
http://secunia.com/advisories/48915
http://secunia.com/advisories/48948
http://secunia.com/advisories/49198
http://secunia.com/advisories/55322
http://secunia.com/advisories/55350
http://secunia.com/advisories/55351
http://security.gentoo.org/glsa/glsa-201203-02.xml
http://security.gentoo.org/glsa/glsa-201406-32.xml
http://support.apple.com/kb/HT4999
http://support.apple.com/kb/HT5001
http://support.apple.com/kb/HT5130
http://support.apple.com/kb/HT5281
http://support.apple.com/kb/HT5501
http://support.apple.com/kb/HT6150
http://technet.microsoft.com/security/advisory/2588513
http://vnhacker.blogspot.com/2011/09/beast.html
http://www.apcmedia.com/salestools/SJHN-7RKGNM/SJHN-7RKGNM_R4_EN.pdf
http://www.debian.org/security/2012/dsa-2398
http://www.educatedguesswork.org/2011/09/security_impact_of_the_rizzodu.html
http://www.ibm.com/developerworks/java/jdk/alerts/
http://www.imperialviolet.org/2011/09/23/chromeandbeast.html
http://www.insecure.cl/Beast-SSL.rar
http://www.kb.cert.org/vuls/id/864643
http://www.mandriva.com/security/advisories?name=MDVSA-2012:058
http://www.opera.com/docs/changelogs/mac/1151/
http://www.opera.com/docs/changelogs/mac/1160/
http://www.opera.com/docs/changelogs/unix/1151/
http://www.opera.com/docs/changelogs/unix/1160/
http://www.opera.com/docs/changelogs/windows/1151/
http://www.opera.com/docs/changelogs/windows/1160/
http://www.opera.com/support/kb/view/1004/
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.oracle.com/technetwork/topics/security/javacpuoct2011-443431.html
http://www.redhat.com/support/errata/RHSA-2011-1384.html
http://www.redhat.com/support/errata/RHSA-2012-0006.html
http://www.securityfocus.com/bid/49388
http://www.securityfocus.com/bid/49778
http://www.securitytracker.com/id/1029190
http://www.securitytracker.com/id?1025997
http://www.securitytracker.com/id?1026103
http://www.securitytracker.com/id?1026704
http://www.ubuntu.com/usn/USN-1263-1
http://www.us-cert.gov/cas/techalerts/TA12-010A.html
http://blogs.oracle.com/sunsecurity/entry/multiple_vulnerabilities_in_fetchmail
http://bugzilla.novell.com/show_bug.cgi?id=719047
http://bugzilla.redhat.com/show_bug.cgi?id=737506
http://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
http://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-006
http://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03839862
http://hermes.opensuse.org/messages/13154861
http://hermes.opensuse.org/messages/13155432
http://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14752

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.