CVE-2018-0732
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.05 Low
EPSS
Percentile
92.7%
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
References
www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
www.securityfocus.com/bid/104442
www.securitytracker.com/id/1041090
access.redhat.com/errata/RHSA-2018:2552
access.redhat.com/errata/RHSA-2018:2553
access.redhat.com/errata/RHSA-2018:3221
access.redhat.com/errata/RHSA-2018:3505
access.redhat.com/errata/RHSA-2019:1296
access.redhat.com/errata/RHSA-2019:1297
access.redhat.com/errata/RHSA-2019:1543
cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4
lists.debian.org/debian-lts-announce/2018/07/msg00043.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/
nodejs.org/en/blog/vulnerability/august-2018-security-releases/
security.gentoo.org/glsa/201811-03
security.netapp.com/advisory/ntap-20181105-0001/
security.netapp.com/advisory/ntap-20190118-0002/
securityadvisories.paloaltonetworks.com/Home/Detail/133
usn.ubuntu.com/3692-1/
usn.ubuntu.com/3692-2/
www.debian.org/security/2018/dsa-4348
www.debian.org/security/2018/dsa-4355
www.openssl.org/news/secadv/20180612.txt
www.oracle.com/security-alerts/cpuapr2020.html
www.oracle.com/security-alerts/cpujan2021.html
www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
www.tenable.com/security/tns-2018-12
www.tenable.com/security/tns-2018-13
www.tenable.com/security/tns-2018-14
www.tenable.com/security/tns-2018-17
Social References
More
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.05 Low
EPSS
Percentile
92.7%