CVE-2016-5017

Exp

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.

Published: 2016-09-21 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-5017 is rated High Exploit Risk (82/100): CVSS High severity, with high exploitation likelihood (EPSS 7.82%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.71% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-5017

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-5017

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 6.11% 7.82% +1.71%
2 2025-09-14 7.34% 6.11% -1.23%
3 2025-08-30 — 7.34% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-5017

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2016-5017

OS Trackers for CVE-2016-5017

vendor priority summary link
debian not yet assigned CVE-2016-5017 not yet assigned priority: Debian including 1 source packages (zookeeper), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-5017
redhat low — https://access.redhat.com/security/cve/CVE-2016-5017
ubuntu low CVE-2016-5017 low priority: Ubuntu including 1 source packages (zookeeper), 16 status rows across 16 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, precise, trusty, upstream, xenial, yakkety, zesty): not-affected 9, ignored 4, released 3. https://ubuntu.com/security/CVE-2016-5017

Affected software / configurations for CVE-2016-5017

Vendor Product Version Raw CPE
apache zookeeper <= 3.4.8 cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*
apache zookeeper 3.5.0 cpe:2.3:a:apache:zookeeper:3.5.0:*:*:*:*:*:*:*
apache zookeeper 3.5.1 cpe:2.3:a:apache:zookeeper:3.5.1:*:*:*:*:*:*:*
apache zookeeper 3.5.2 cpe:2.3:a:apache:zookeeper:3.5.2:*:*:*:*:*:*:*

References for CVE-2016-5017

URL Tags
http://packetstormsecurity.com/files/138755/ZooKeeper-3.4.8-3.5.2-Buffer-Overflow.html Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2016/09/17/3 Release Notes Third 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.apache.org%3E
https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E
https://lists.apache.org/thread.html/r4b743f407244294f316325458ccaabfce9cd70ca3a6423dbe574035c%40%3Cnotifications.dubbo.apache.org%3E
https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E
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
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