← Vulnerability feed

Vulnerability record · CVE-2016-5017 · published 21 September 2016

CVE-2016-5017: Apache zookeeper memory buffer overflow vulnerability

Apache · Zookeeper

Buffer overflow in the C cli shell in Apache Zookeeper before 3.4.9 and 3.5.x before 3.5.3, when using the "cmd:" batch mode syntax, allows attackers to have unspecified impact via a long command string.

8.1 CVSS 3.0 High EPSS 7.9% · top 5.5% CWE-119 · Memory buffer overflow
8.1CVSS 3.0 base score, v2 6.8
7.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Buffer overflow in the C cli shell in Apache Zookeeper before 3.4.9 and 3.5.x before 3.5.3, when using the "cmd:" batch mode syntax, allows attackers to have unspecified impact via a long command string.

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/138755/ZooKeeper-3.4.8-3.5.2-Buffer-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2016/09/17/3 Release NotesThird Party Advisory
http://www.securityfocus.com/bid/93044
https://git-wip-us.apache.org/repos/asf?p=zookeeper.git%3Ba=commitdiff%3Bh=27ecf981a15554dc8e64a28630af7a5c9e2bdf4f
https://git-wip-us.apache.org/repos/asf?p=zookeeper.git%3Ba=commitdiff%3Bh=f09154d6648eeb4ec5e1ac8a2bacbd2f8c87c14a
https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apach
https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.o
https://lists.apache.org/thread.html/r4b743f407244294f316325458ccaabfce9cd70ca3a6423dbe574035c%40%3Cnotifications.dubbo.
https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.
https://www.cloudera.com/documentation/other/security-bulletins/topics/csb_topic_1.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://zookeeper.apache.org/security.html#CVE-2016-5017 Vendor Advisory
http://packetstormsecurity.com/files/138755/ZooKeeper-3.4.8-3.5.2-Buffer-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2016/09/17/3 Release NotesThird Party Advisory
http://www.securityfocus.com/bid/93044
https://git-wip-us.apache.org/repos/asf?p=zookeeper.git%3Ba=commitdiff%3Bh=27ecf981a15554dc8e64a28630af7a5c9e2bdf4f
https://git-wip-us.apache.org/repos/asf?p=zookeeper.git%3Ba=commitdiff%3Bh=f09154d6648eeb4ec5e1ac8a2bacbd2f8c87c14a
https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apach
https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.o
https://lists.apache.org/thread.html/r4b743f407244294f316325458ccaabfce9cd70ca3a6423dbe574035c%40%3Cnotifications.dubbo.
https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.
https://www.cloudera.com/documentation/other/security-bulletins/topics/csb_topic_1.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://zookeeper.apache.org/security.html#CVE-2016-5017 Vendor Advisory

Track CVE-2016-5017 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2024-51504Apache zookeeper authentication bypass by spoofing vulnerabilityWhen using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP bas…EPSS 0.92%9.1CVE-2023-44981Apache zookeeper insecure direct object reference vulnerabilityAuthorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quoru…EPSS 1.7%7.5CVE-2026-79993Apache zookeeper missing authorization vulnerabilityThe `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete speci…EPSS 0.60%7.5CVE-2026-59739Apache zookeeper missing authorization vulnerabilityInformation disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. An attacker can discover ACL-restricted paths by…EPSS 0.55%7.5CVE-2026-59969Apache zookeeper vulnerabilityApache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments. When sslQuorum=true, zookeeper.fips-mode=true, ssl.…EPSS 0.33%7.5CVE-2026-24308Apache zookeeper sensitive information in log file vulnerabilityImproper handling of configuration values in ZKConfig in Apache ZooKeeper 3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive inf…EPSS 1.2%7.5CVE-2018-8012Apache zookeeper missing authorization vulnerabilityNo authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-…EPSS 8.5%7.5CVE-2017-5637Apache ZooKeeper unauthenticated four-letter commands cause CPU exhaustionApache ZooKeeper exposes the four-letter word commands "wchp" and "wchc", which are CPU intensive and lack authentication. An attacker can abuse them…EPSS 73%analysed

Source: NIST National Vulnerability Database (record CVE-2016-5017), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.