Explain CVE-2018-0739
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Affected Products: OpenSSL
References: [{'name': 'USN-3611-2', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3611-2/'}, {'name': 'DSA-4158', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'https://www.debian.org/security/2018/dsa-4158'}, {'name': 'GLSA-201811-21', 'tags': ['vendor-advisory', 'x_refsource_GENTOO'], 'url': 'https://security.gentoo.org/glsa/201811-21'}, {'name': 'RHSA-2019:0367', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:0367'}, {'name': 'DSA-4157', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'https://www.debian.org/security/2018/dsa-4157'}, {'name': 'RHSA-2018:3505', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3505'}, {'name': '103518', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/103518'}, {'name': '1040576', 'tags': ['vdb-entry', 'x_refsource_SECTRACK'], 'url': 'http://www.securitytracker.com/id/1040576'}, {'name': 'RHSA-2018:3221', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3221'}, {'name': '105609', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/105609'}, {'name': 'USN-3611-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3611-1/'}, {'name': '[debian-lts-announce] 20180330 [SECURITY] [DLA 1330-1] openssl security update', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.debian.org/debian-lts-announce/2018/03/msg00033.html'}, {'name': 'RHSA-2019:0366', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:0366'}, {'name': 'RHSA-2018:3090', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3090'}, {'name': 'RHSA-2019:1711', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1711'}, {'name': 'RHSA-2019:1712', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1712'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://security.netapp.com/advisory/ntap-20180726-0002/'}, {'name': 'GLSA-202007-53', 'tags': ['vendor-advisory', 'x_refsource_GENTOO'], 'url': 'https://security.gentoo.org/glsa/202007-53'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://securityadvisories.paloaltonetworks.com/Home/Detail/133'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com//security-alerts/cpujul2021.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.tenable.com/security/tns-2018-07'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.tenable.com/security/tns-2018-04'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://nodejs.org/en/blog/vulnerability/march-2018-security-releases/'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2ac4c6f7b2b2af20c0e2b0ba05367e454cd11b33'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9310d45087ae546e27e61ddf8f6367f29848220d'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.tenable.com/security/tns-2018-06'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://security.netapp.com/advisory/ntap-20180330-0002/'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://www.openssl.org/news/secadv/20180327.txt'}]
CVE State: PUBLISHED