HIGH
zookeeper: Incorrect input validation with wchp/wchc four letter words
Published Oct 10, 2017
7.5
HIGHCVSS 3.0
EPSS 73.06%
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.
Affected products
-
- Version 3.4.0 to 3.4.9StatusaffectedConstraints-
- Version 3.5.0 to 3.5.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper | n/a |
|
Configuration 1
OR
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.4.8
- 3.4.9
- 3.5.0
- 3.5.1
- 3.5.2
Configuration 2
- 8.0
No data.
Red Hat JBoss BPMS 6.4
zookeeper
Fixed · RHSA-2017:3355
Red Hat JBoss BRMS 6.4
zookeeper
Fixed · RHSA-2017:3354
Red Hat JBoss Data Virtualization 6.3
zookeeper
Fixed · RHSA-2017:2477
Red Hat JBoss A-MQ 6
zookeeper
Will not fix
Red Hat JBoss Fuse 6
zookeeper
Will not fix
Red Hat OpenShift Enterprise 2
zookeeper
Under investigation
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss BPMS 6.4 | zookeeper | Fixed | RHSA-2017:3355 |
| Red Hat JBoss BRMS 6.4 | zookeeper | Fixed | RHSA-2017:3354 |
| Red Hat JBoss Data Virtualization 6.3 | zookeeper | Fixed | RHSA-2017:2477 |
| Red Hat JBoss A-MQ 6 | zookeeper | Will not fix | n/a |
| Red Hat JBoss Fuse 6 | zookeeper | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | zookeeper | Under investigation | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
73.06% 0.73064
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.73064
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (30 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 73.06% (0.73064) | 99.44th | v5 (v2026.06.15) |
| Sep 22, 2026 | 73.06% (0.73064) | 99.43th | v5 (v2026.06.15) |
| Sep 21, 2026 | 68.53% (0.68529) | 99.33th | v5 (v2026.06.15) |
| Sep 6, 2026 | 73.06% (0.73064) | 99.42th | v5 (v2026.06.15) |
| Sep 5, 2026 | 68.53% (0.68529) | 99.31th | v5 (v2026.06.15) |
| Aug 30, 2026 | 73.06% (0.73064) | 99.41th | v5 (v2026.06.15) |
| Aug 28, 2026 | 68.53% (0.68529) | 99.31th | v5 (v2026.06.15) |
| Aug 24, 2026 | 73.06% (0.73064) | 99.41th | v5 (v2026.06.15) |
| Aug 23, 2026 | 68.53% (0.68529) | 99.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 73.65% (0.73654) | 99.40th | v5 (v2026.06.15) |
| Nov 21, 2025 | 17.45% (0.17446) | 94.80th | v4 (v2025.03.14) |
| Nov 18, 2025 | 42.96% (0.42957) | 97.33th | v4 (v2025.03.14) |
| Sep 14, 2025 | 16.89% (0.16885) | 94.71th | v4 (v2025.03.14) |
| Jul 22, 2025 | 22.00% (0.22005) | 95.51th | v4 (v2025.03.14) |
| Apr 30, 2025 | 19.98% (0.19977) | 95.10th | v4 (v2025.03.14) |
| Mar 30, 2025 | 16.21% (0.16211) | 94.26th | v4 (v2025.03.14) |
| Mar 29, 2025 | 34.88% (0.34879) | 95.39th | v4 (v2025.03.14) |
| Mar 17, 2025 | 16.21% (0.16211) | 94.32th | v4 (v2025.03.14) |
| Dec 17, 2024 | 6.50% (0.06498) | 93.66th | v3 (v2023.03.01) |
| Nov 8, 2023 | 4.54% (0.04537) | 91.58th | v3 (v2023.03.01) |
| May 8, 2023 | 6.68% (0.06675) | 92.70th | v3 (v2023.03.01) |
| Apr 11, 2023 | 6.46% (0.06461) | 92.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.50% (0.07495) | 93.04th | v3 (v2023.03.01) |
| Mar 6, 2023 | 43.52% (0.43518) | 98.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 43.52% (0.43518) | 97.65th | v2 (v2022.01.01) |
| Feb 3, 2022 | 27.08% (0.27084) | 95.71th | v1 |
| Jan 6, 2022 | 27.08% (0.27084) | 95.66th | v1 |
| Sep 1, 2021 | 27.08% (0.27084) | 98.33th | v1 |
| Jul 21, 2021 | 27.08% (0.27084) | 0.00th | v1 |
| Apr 14, 2021 | 25.52% (0.25522) | 0.00th | v1 |
References (21)
- http://www.debian.org/security/2017/dsa-3871 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securityfocus.com/bid/98814 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2477 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:3354 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:3355 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-5637 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1454808 Issue Tracking
- https://github.com/advisories/GHSA-7cwj-j333-x7f7 Advisory
- https://issues.apache.org/jira/browse/ZOOKEEPER-2693 x_refsource_CONFIRMIssue TrackingMitigationVendor Advisory
- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272@%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370@%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3@%3Ccommits.nifi.apache.org%3E
- https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b@%3Ccommits.nifi.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2017-5637
- https://www.cve.org/CVERecord?id=CVE-2017-5637
- https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISC
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Oct 10, 2017
Updated Sep 17, 2024
Reserved Jan 29, 2017
Link CVE-2017-5637
CISA Vulnrichment
GHSA-7CWJ-J333-X7F7 Updated n/a