CVE-2018-0732 (GCVE-0-2018-0732)

Vulnerability from cvelistv5 – Published: 2018-06-12 13:00 – Updated: 2024-09-17 02:11
VLAI
Title
Client DoS due to large DH parameter
Summary
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).
Severity
No CVSS data available.
CWE
  • Client side Denial of Service
Assigner
References
URL Tags
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/104442 vdb-entryx_refsource_BID
https://www.debian.org/security/2018/dsa-4355 vendor-advisoryx_refsource_DEBIAN
https://access.redhat.com/errata/RHSA-2018:2552 vendor-advisoryx_refsource_REDHAT
https://security.gentoo.org/glsa/201811-03 vendor-advisoryx_refsource_GENTOO
https://usn.ubuntu.com/3692-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:2553 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3505 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3692-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:3221 vendor-advisoryx_refsource_REDHAT
https://www.debian.org/security/2018/dsa-4348 vendor-advisoryx_refsource_DEBIAN
http://www.securitytracker.com/id/1041090 vdb-entryx_refsource_SECTRACK
https://access.redhat.com/errata/RHSA-2019:1297 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1296 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1543 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
https://www.tenable.com/security/tns-2018-14 x_refsource_CONFIRM
https://securityadvisories.paloaltonetworks.com/H… x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-13 x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-17 x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-12 x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2018110… x_refsource_CONFIRM
https://nodejs.org/en/blog/vulnerability/august-2… x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://www.openssl.org/news/secadv/20180612.txt x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019011… x_refsource_CONFIRM
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h)
Affected: Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)
Create a notification for this product.
Date Public
2018-06-12 00:00
Credits
Guido Vranken
Show details on NVD website
To clipboard 

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          "DATE_PUBLIC": "2018-06-12",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:16:26+00:00",
      "cve": "CVE-2018-0732",
      "id": "CVE-2018-0732",
      "initial_release_date": "2018-06-12T00:00:00+00:00",
      "product_status:fixed": "172",
      "product_status:known_affected": "16",
      "product_status:known_not_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssl: Malicious server can send large prime to client during DH(E) TLS handshake causing the client to hang",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-0732.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.