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Fencer Vulns
high 8.2

CVE-2017-2295 json

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specifie…

published 2017-07-05 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11478

cvss
8.2
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML.

Patch / fix

  • puppet Debian 11 4.8.2-5

debian advisories DEBIAN-CVE-2017-2295

  • puppet Ubuntu 14.04 LTS 3.4.3-1ubuntu1.2
  • puppet Ubuntu Pro 16.04 LTS 3.8.5-2ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2017-2295

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

  • kobo satellite capsule 6.3, satellite 6.3 0.5.1-1.el7sat
  • pulp satellite capsule 6.3, satellite 6.3 2.13.4.6-1.el7sat
  • hiera satellite capsule 6.3, satellite 6.3 1.3.1-2.el7sat
  • foreman satellite capsule 6.3, satellite 6.3 1.15.6.34-1.el7sat
  • katello satellite capsule 6.3, satellite 6.3 3.4.5-15.el7sat
  • pulp-rpm satellite capsule 6.3, satellite 6.3 2.13.4.8-1.el7sat
  • candlepin satellite 6.3 2.1.14-1.el7
  • satellite satellite capsule 6.3, satellite 6.3 6.3.0-23.0.el7sat

red hat advisories RHSA-2018:0336

  • puppet SLES for SAP 11 SP4, SLES 11 SP4 2.7.26-0.5.3.1
  • puppet SLED 12 SP3, SLED 12 SP2, SLE Module for Advanced Systems Management 12 3.8.5-15.3.3

suse advisories SUSE-SU-2018:0600-1SUSE-SU-2017:2113-1

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-2017-2295 updated cvss 8.1

puppet: Unsafe YAML deserialization

  • Red Hat Ceph Storage 1.3 puppet Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) puppet Red Hat Enterprise Linux OpenStack Platform 6 (Juno) puppet Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer puppet Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) puppet, puppet-server Red Hat OpenStack Platform 8 (Liberty) puppet, puppet-server
    +5 more products
    Red Hat OpenStack Platform 9 (Mitaka) puppet, puppet-server Red Hat OpenStack Platform 10 (Newton) puppet, puppet-server Red Hat OpenStack Platform 11 (Ocata) puppet Red Hat OpenStack Platform 12 (Pike) puppet, puppet-server Red Hat Subscription Asset Manager puppet
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6.3 kobo 0.5.1-1.el7sat, hiera 1.3.1-2.el7sat, candlepin 2.1.14-1.el7, pulp 2.13.4.6-1.el7sat, katello 3.4.5-15.el7sat, foreman 1.15.6.34-1.el7sat, +107 more Red Hat Satellite Capsule 6.3 kobo 0.5.1-1.el7sat, hiera 1.3.1-2.el7sat, pulp 2.13.4.6-1.el7sat, katello 3.4.5-15.el7sat, foreman 1.15.6.34-1.el7sat, pulp-docker 2.4.1-2.el7sat, +77 more
    fixed: vendor fix RHSA-2018:0336

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

2.76% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.2 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • Puppet Puppet server

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

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.