Key Management Errors Affecting openssl package, versions <1.1.0j-1~deb9u1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 3.81% (92nd percentile)
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NVD
7.5 high
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SUSE
5.3 medium
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Red Hat
4.3 medium

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  • Snyk ID SNYK-DEBIAN9-OPENSSL-374003
  • published 12 Jun 2018
  • disclosed 12 Jun 2018

How to fix?

Upgrade Debian:9 openssl to version 1.1.0j-1~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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).