| Name | CVE-2017-5637 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-986-1, DSA-3871-1 |
| Debian Bugs | 863811 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| zookeeper (PTS) | jessie, jessie (lts) | 3.4.9-3+deb8u2 | fixed |
| stretch (security), stretch (lts), stretch | 3.4.9-3+deb9u2 | fixed | |
| buster (security), buster, buster (lts) | 3.4.13-2+deb10u1 | fixed | |
| bullseye (security), bullseye | 3.4.13-6+deb11u1 | fixed | |
| bookworm (security), bookworm | 3.8.0-11+deb12u1 | fixed | |
| sid, trixie | 3.9.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| zookeeper | source | wheezy | 3.4.5+dfsg-2+deb7u1 | DLA-986-1 | ||
| zookeeper | source | jessie | 3.4.5+dfsg-2+deb8u2 | DSA-3871-1 | ||
| zookeeper | source | (unstable) | 3.4.9-3 | 863811 |
https://issues.apache.org/jira/browse/ZOOKEEPER-2693