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Fencer Vulns
critical 9.8

CVE-2017-16820 json

The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case…

published 2017-11-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-7995

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).

Patch / fix

  • collectd collectd 5.6.3
  • collectd Debian 13, Debian 12 5.8.0-1

debian advisories DEBIAN-CVE-2017-16820

  • collectd Ubuntu Pro 14.04 LTS 5.4.0-3ubuntu2.2+esm1
  • collectd Ubuntu Pro 16.04 LTS 5.5.1-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2017-16820

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • collectd storage 3.4 5.7.2-3.1.el7rhgs
  • collectd-ping storage 3.4 5.7.2-3.1.el7rhgs
  • libcollectdclient storage 3.4 5.7.2-3.1.el7rhgs
  • collectd openstack-optools 10 5.8.0-10.el7ost
  • collectd-dbi openstack-optools 10 5.8.0-10.el7ost
  • collectd-dns openstack-optools 10 5.8.0-10.el7ost
  • collectd-rdt openstack-optools 10 5.8.0-10.el7ost
  • collectd-bind openstack-optools 10 5.8.0-10.el7ost

red hat advisories RHSA-2018:2615RHSA-2018:1605RHSA-2018:0560RHSA-2018:0252RHSA-2018:0299

  • collectd Alpine 3.6, Alpine 3.5 5.6.2-r1

alpine advisories ALPINE-CVE-2017-16820

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-16820 updated cvss 5.6

collectd: double free in csnmp_read_table function in snmp.c

  • Red Hat Ceph Storage 2 collectd, collectd-python Red Hat Ceph Storage 3 collectd, collectd-python
    affected: no fix available
  • Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational Tools collectd, collectd-dbi, collectd-dns, collectd-lvm, collectd-amqp, collectd-curl, +18 more Red Hat OpenStack Platform 8 (Liberty) Operational Tools collectd, collectd-dbi, collectd-dns, collectd-lvm, collectd-amqp, collectd-curl, +18 more Red Hat OpenStack Platform 9 (Mitaka) Operational Tools collectd, collectd-dbi, collectd-dns, collectd-lvm, collectd-amqp, collectd-curl, +18 more Red Hat Storage Console 2 collectd
    affected: no fix planned “Will not fix”
  • Red Hat Gluster 3.4 Web Administration Node Agent on RHEL-7 collectd 5.7.2-3.1.el7rhgs, collectd-ping 5.7.2-3.1.el7rhgs, libcollectdclient 5.7.2-3.1.el7rhgs Red Hat Gluster 3.4 Web Administration on RHEL-7 collectd 5.7.2-3.1.el7rhgs, collectd-ping 5.7.2-3.1.el7rhgs, libcollectdclient 5.7.2-3.1.el7rhgs
    fixed: vendor fix RHSA-2018:2615
  • Red Hat OpenStack Platform 10.0 Operational Tools for RHEL 7 collectd 5.8.0-10.el7ost, collectd-dbi 5.8.0-10.el7ost, collectd-dns 5.8.0-10.el7ost, collectd-rdt 5.8.0-10.el7ost, intel-cmt-cat 1.0.1-1.el7ost, collectd-bind 5.8.0-10.el7ost, +42 more
    fixed: vendor fix RHSA-2018:1605
  • Red Hat OpenStack Platform 11.0 Operational Tools for RHEL 7 collectd 5.7.2-3.el7ost, collectd-dbi 5.7.2-3.el7ost, collectd-dns 5.7.2-3.el7ost, collectd-lvm 5.7.2-3.el7ost, collectd-web 5.7.2-3.el7ost, collectd-bind 5.7.2-3.el7ost, +37 more
    fixed: vendor fix RHSA-2018:0299
  • Red Hat OpenStack Platform 12.0 Operational Tools for RHEL 7 collectd 5.7.2-3.el7ost, collectd-dbi 5.7.2-3.el7ost, collectd-dns 5.7.2-3.el7ost, collectd-lvm 5.7.2-3.el7ost, collectd-web 5.7.2-3.el7ost, collectd-bind 5.7.2-3.el7ost, +38 more
    fixed: vendor fix RHSA-2018:0252
  • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts collectd 5.8.0-3.el7, collectd-dbi 5.8.0-3.el7, collectd-dns 5.8.0-3.el7, collectd-lvm 5.8.0-3.el7, collectd-bind 5.8.0-3.el7, collectd-ceph 5.8.0-3.el7, +37 more Red Hat Virtualization Manager 4.1 collectd 5.8.0-3.el7, collectd-dbi 5.8.0-3.el7, collectd-dns 5.8.0-3.el7, collectd-lvm 5.8.0-3.el7, collectd-bind 5.8.0-3.el7, collectd-ceph 5.8.0-3.el7, +36 more
    fixed: vendor fix RHSA-2018:0560

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.60% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.