PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). References: https://lists.tartarus.org/pipermail/putty-announce/ https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
Created putty tracking bugs for this issue: Affects: epel-6 [bug 1852417] Affects: epel-7 [bug 1852418] Affects: fedora-all [bug 1852416]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.