yaml-cpp: DoS in Scanner::EnsureTokensInQueue function in yaml-cpp
Published Dec 28, 2018
6.5
MEDIUMCVSS 3.0
EPSS 2.54%
Description
The Scanner::EnsureTokensInQueue function in yaml-cpp (aka LibYaml-C++) 0.6.2 allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted YAML file.
Affected products
No data.
- 0.6.2
No data.
Red Hat OpenStack Platform 10 (Newton)
yaml-cpp
Fix deferred
Red Hat OpenStack Platform 13 (Queens)
yaml-cpp
Fix deferred
Red Hat OpenStack Platform 14 (Rocky)
yaml-cpp
Affected
Red Hat OpenStack Platform 8 (Liberty)
yaml-cpp
Fix deferred
Red Hat OpenStack Platform 9 (Mitaka)
yaml-cpp
Fix deferred
Red Hat Satellite 6
yaml-cpp
Will not fix
Red Hat Software Collections
rh-mongodb32-yaml-cpp
Will not fix
Red Hat Software Collections
rh-mongodb34-yaml-cpp
Will not fix
Red Hat Software Collections
rh-mongodb36-yaml-cpp
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenStack Platform 10 (Newton) | yaml-cpp | Fix deferred | n/a |
| Red Hat OpenStack Platform 13 (Queens) | yaml-cpp | Fix deferred | n/a |
| Red Hat OpenStack Platform 14 (Rocky) | yaml-cpp | Affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | yaml-cpp | Fix deferred | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | yaml-cpp | Fix deferred | n/a |
| Red Hat Satellite 6 | yaml-cpp | Will not fix | n/a |
| Red Hat Software Collections | rh-mongodb32-yaml-cpp | Will not fix | n/a |
| Red Hat Software Collections | rh-mongodb34-yaml-cpp | Will not fix | n/a |
| Red Hat Software Collections | rh-mongodb36-yaml-cpp | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of rh-mongodb32-yaml-cpp, rh-mongodb34-yaml-cpp, and rh-mongodb36-yaml-cpp as shipped with Red Hat Software Collections. However, this is only used to parse configuration files. Red Hat Satellite 6.5 ship yaml-cpp however has been rated as a security impact of Low, product version Satellite 6.6 onward is not affected. Satellite 6.5 is in Maintenance Support phase of the product life cycle and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Satellite 6 Life Cycle: https://access.redhat.com/support/policy/updates/satellite.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.54% (0.02536) | 84.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.54% (0.02536) | 82.85th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00150) | 51.66th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.15% (0.00150) | 50.59th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.14% (0.00144) | 49.29th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.13% (0.00131) | 46.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.17% (0.00167) | 51.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.65% (0.00651) | 18.22th | v1 |
| Jan 6, 2022 | 0.65% (0.00651) | 17.65th | v1 |
| Sep 1, 2021 | 0.65% (0.00651) | 45.91th | v1 |
| Apr 14, 2021 | 0.65% (0.00651) | 0.00th | v1 |
References (6)
- http://seclists.org/fulldisclosure/2024/Nov/0
- https://access.redhat.com/security/cve/CVE-2018-20573 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1665567 Issue Tracking
- https://github.com/jbeder/yaml-cpp/issues/655 x_refsource_MISCExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-20573
- https://www.cve.org/CVERecord?id=CVE-2018-20573
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/fulldisclosure/2024/Nov/0 | ||
| https://access.redhat.com/security/cve/CVE-2018-20573 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1665567 | Issue Tracking | |
| https://github.com/jbeder/yaml-cpp/issues/655 | x_refsource_MISCExploitThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-20573 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-20573 |
Change history (0)
No recorded changes yet.