drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in OpenSSL
Name: |
Mehrere Probleme in OpenSSL |
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ID: |
USN-2959-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 12.04 LTS, Ubuntu 14.04 LTS, Ubuntu 15.10, Ubuntu 16.04 LTS |
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Datum: |
Di, 3. Mai 2016, 17:33 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2105
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2106
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2107
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2109
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2108 |
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Applikationen: |
OpenSSL |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-2959-1 May 03, 2016
openssl vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS - Ubuntu 15.10 - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in OpenSSL.
Software Description: - openssl: Secure Socket Layer (SSL) cryptographic library and tools
Details:
Huzaifa Sidhpurwala, Hanno Böck, and David Benjamin discovered that OpenSSL incorrectly handled memory when decoding ASN.1 structures. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-2108)
Juraj Somorovsky discovered that OpenSSL incorrectly performed padding when the connection uses the AES CBC cipher and the server supports AES-NI. A remote attacker could possibly use this issue to perform a padding oracle attack and decrypt traffic. (CVE-2016-2107)
Guido Vranken discovered that OpenSSL incorrectly handled large amounts of input data to the EVP_EncodeUpdate() function. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-2105)
Guido Vranken discovered that OpenSSL incorrectly handled large amounts of input data to the EVP_EncryptUpdate() function. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-2106)
Brian Carpenter discovered that OpenSSL incorrectly handled memory when ASN.1 data is read from a BIO. A remote attacker could possibly use this issue to cause memory consumption, resulting in a denial of service. (CVE-2016-2109)
As a security improvement, this update also modifies OpenSSL behaviour to reject DH key sizes below 1024 bits, preventing a possible downgrade attack.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 LTS: libssl1.0.0 1.0.2g-1ubuntu4.1
Ubuntu 15.10: libssl1.0.0 1.0.2d-0ubuntu1.5
Ubuntu 14.04 LTS: libssl1.0.0 1.0.1f-1ubuntu2.19
Ubuntu 12.04 LTS: libssl1.0.0 1.0.1-4ubuntu5.36
After a standard system update you need to reboot your computer to make all the necessary changes.
References: http://www.ubuntu.com/usn/usn-2959-1 CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, CVE-2016-2108, CVE-2016-2109
Package Information: https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.1 https://launchpad.net/ubuntu/+source/openssl/1.0.2d-0ubuntu1.5 https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.19 https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.36
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