Explain CVE-2016-0736
In Apache HTTP Server versions 2.4.0 to 2.4.23, mod_session_crypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC.
Affected Products: Apache HTTP Server
References: [{'tags': ['x_refsource_CONFIRM'], 'url': 'https://support.apple.com/HT208221'}, {'name': 'DSA-3796', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'http://www.debian.org/security/2017/dsa-3796'}, {'name': '40961', 'tags': ['exploit', 'x_refsource_EXPLOIT-DB'], 'url': 'https://www.exploit-db.com/exploits/40961/'}, {'name': '1037508', 'tags': ['vdb-entry', 'x_refsource_SECTRACK'], 'url': 'http://www.securitytracker.com/id/1037508'}, {'name': 'RHSA-2017:1413', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2017:1413'}, {'name': 'RHSA-2017:1161', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2017:1161'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.tenable.com/security/tns-2017-04'}, {'name': 'RHSA-2017:1414', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2017:1414'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us'}, {'name': '95078', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/95078'}, {'name': 'RHSA-2017:1415', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://rhn.redhat.com/errata/RHSA-2017-1415.html'}, {'name': 'RHSA-2017:0906', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2017:0906'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-0736'}, {'name': 'GLSA-201701-36', 'tags': ['vendor-advisory', 'x_refsource_GENTOO'], 'url': 'https://security.gentoo.org/glsa/201701-36'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://security.netapp.com/advisory/ntap-20180423-0001/'}, {'name': '[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20190815 svn commit: r1048742 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1888194 [10/13] - /httpd/site/trunk/content/security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073139 [10/13] - in /websites/staging/httpd/trunk/content: ./ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073146 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073149 [10/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210606 svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E'}]
CVE State: PUBLISHED