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CVE-2017-5637

CVE-2017-5637

EPSS 73.7%
Two four letter word commands "wchp/wchc" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later.
Affected products
Apache Software Foundation · Apache ZooKeeper
public PoCs found — 1
exploitdbwww.exploit-db.com/exploits/42294unverified
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References
https://access.redhat.com/errata/RHSA-2017:2477https://access.redhat.com/errata/RHSA-2017:3354https://access.redhat.com/errata/RHSA-2017:3355https://issues.apache.org/jira/browse/ZOOKEEPER-2693https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3Ehttps://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3Ehttps://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3Ehttps://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3Ehttps://www.oracle.com/security-alerts/cpujul2020.htmlhttps://www.oracle.com//security-alerts/cpujul2021.htmlhttp://www.debian.org/security/2017/dsa-3871http://www.securityfocus.com/bid/98814