Deserialization of untrusted data in Puppet server
Priority MEDIUM 41CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Partial Red Hat: 2 fixed, 11 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-502.
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.
Why it matters now
EPSS 0.02762 86th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 11 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Puppet | Puppet server | Puppet prior to 4.10.1 | — | No fix listed | CNA |
- Puppet server VendorPuppet Affected Puppet prior to 4.10.1 Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2018:0336 Released 2018-02-21 · Red Hat rating ImportantSatellite 6.3 security, bug fix, and enhancement update
- Red Hat Satellite 6.3 candlepin-2.1.14-1.el7, candlepin-selinux-2.1.14-1.el7, foreman-1.15.6.34-1.el7sat +47
- Red Hat Satellite Capsule 6.3 foreman-1.15.6.34-1.el7sat, foreman-bootloaders-redhat-201801241201-2.el7sat, foreman-bootloaders-redhat-tftpboot-201801241201-2.el7sat +47
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ceph Storage 1.3 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 11 (Ocata) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 12 (Pike) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 8 (Liberty) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 9 (Mitaka) | Affected | No fix planned: Will not fix |
| Red Hat Subscription Asset Manager | Affected | No fix planned: Will not fix |
| Red Hat Satellite 6.3 | Fixed | RHSA-2018:0336 |
| Red Hat Satellite Capsule 6.3 | Fixed | RHSA-2018:0336 |
Timeline
- 2026-10-02 Threatist record created from CVE-2017-2295
- 2026-10-03 Alias added: GHSA-988w-9qqw-43hr
References
More Puppet vulnerabilities
- TI-2016-02327 Puppet Server before 2.3.2 and Ruby puppetmaster in Puppet 4.x before 4.4.2 and in Puppet… CVSS 3.1CRITICAL 9.8
- TI-2013-01442 The (1) template and (2) inline_template functions in the master server in Puppet before… CVSS 2.0HIGH 9.0
- TI-2021-08594 SQL injection in Puppet DB CVSS 3.1HIGH 8.8
- TI-2018-04793 Untrusted search path in Puppet Enterprise and Puppet Agent CVSS 3.0HIGH 8.8
- TI-2013-01456 Puppet 2.7.x before 2.7.21 and 3.1.x before 3.1.1, when running Ruby 1.9.3 or later… CVSS 2.0HIGH 7.5
- TI-2013-01454 Puppet before 2.6.18, 2.7.x before 2.7.21, and 3.1.x before 3.1.1, and Puppet Enterprise… CVSS 2.0HIGH 7.1
Sources
- CVE-2017-2295 · CVE Program
- CVE-2017-2295 · NVD
- FIRST EPSS
- GHSA-988w-9qqw-43hr · GitHub Advisory Database · CC BY 4.0
- CVE-2017-2295 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences