vulnwire
7.5high

CVE-2018-0732in critical feed

Client DoS due to large DH parameter

Published 8 y ago · modified 29 d ago · JSON

CVSS
7.5
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
47.0%
percentile 99%
Public exploits
0
none known

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).

CISA SSVC assessment

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
29 d ago

Exploit prediction (EPSS)

47.01% probability of exploitation in the next 30 days, higher than 99% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.17.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds
Node.js (RSS, critical only) · OpenSSL (RSS, critical only)

References

  • lists.debian.org /debian-lts-announce/2018/07/msg00043.html · mailing-list, x_refsource_MLIST, x_transferred
  • securityfocus.com /bid/104442 · vdb-entry, x_refsource_BID, x_transferred
  • debian.org /security/2018/dsa-4355 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • access.redhat.com /errata/RHSA-2018:2552 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • security.gentoo.org /glsa/201811-03 · vendor-advisory, x_refsource_GENTOO, x_transferred
  • usn.ubuntu.com /3692-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • access.redhat.com /errata/RHSA-2018:2553 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2018:3505 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • usn.ubuntu.com /3692-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • access.redhat.com /errata/RHSA-2018:3221 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • debian.org /security/2018/dsa-4348 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securitytracker.com /id/1041090 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • access.redhat.com /errata/RHSA-2019:1297 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2019:1296 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2019:1543 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JY · vendor-advisory, x_refsource_FEDORA, x_transferred
  • lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5F · vendor-advisory, x_refsource_FEDORA, x_transferred
  • lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4 · vendor-advisory, x_refsource_FEDORA, x_transferred
  • oracle.com /security-alerts/cpuapr2020.html · x_refsource_MISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2018-4428296.html · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpujan2019-5072801.html · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpuapr2019-5072813.html · x_refsource_MISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpujul2019-5072835.html · x_refsource_MISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2019-5072832.html · x_refsource_MISC, x_transferred
  • oracle.com /security-alerts/cpujan2021.html · x_refsource_MISC, x_transferred
  • tenable.com /security/tns-2018-14 · x_refsource_CONFIRM, x_transferred
  • securityadvisories.paloaltonetworks.com /Home/Detail/133 · x_refsource_CONFIRM, x_transferred
  • tenable.com /security/tns-2018-13 · x_refsource_CONFIRM, x_transferred
  • tenable.com /security/tns-2018-17 · x_refsource_CONFIRM, x_transferred
  • tenable.com /security/tns-2018-12 · x_refsource_CONFIRM, x_transferred
  • security.netapp.com /advisory/ntap-20181105-0001/ · x_refsource_CONFIRM, x_transferred
  • nodejs.org /en/blog/vulnerability/august-2018-security-releases/ · x_refsource_CONFIRM, x_transferred
  • git.openssl.org /gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098 · x_refsource_CONFIRM, x_transferred
  • openssl.org /news/secadv/20180612.txt · x_refsource_CONFIRM, x_transferred
  • git.openssl.org /gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4 · x_refsource_CONFIRM, x_transferred
  • security.netapp.com /advisory/ntap-20190118-0002/ · x_refsource_CONFIRM, x_transferred
  • cert-portal.siemens.com /productcert/pdf/ssa-419820.pdf · x_refsource_CONFIRM, x_transferred

Sources

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