Yaml
CVE-2012-1152
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Format string safety
|
| Impact | CVSS score of 5.0 (MEDIUM). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 3.85%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
Multiple format string vulnerabilities in the error reporting functionality in the YAML::LibYAML (aka YAML-LibYAML and perl-YAML-LibYAML) module 0.38 for Perl allow remote attackers to cause a denial. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-134. Multiple format string vulnerabilities in the error reporting functionality in the YAML::LibYAML (aka YAML-LibYAML and perl-YAML-LibYAML) module 0.38 for Perl allow remote attackers to cause a denial of service (process crash) via format string specifiers in a (1) YAML stream to the Load function, (2) YAML node to the load_node function, (3) YAML mapping to the load_mapping function, or (4) YAML sequence to the load_sequence function. Affected products include: Ingy Yaml\.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/Au:N/C:N/I:N/A:P
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Multiple format string vulnerabilities in the error reporting functionality in the YAML::LibYAML (aka YAML-LibYAML and perl-YAML-LibYAML) module 0.38 for Perl allow remote attackers to cause a denial of service (process crash) via format string specifiers in a (1) YAML stream to the Load function, (2) YAML node to the load_node function, (3) YAML mapping to the load_mapping function, or (4) YAML sequence to the load_sequence function.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
Uncaught Exception in GitHub repository eemeli/yaml prior to 2.0.0-5. Rated high severity (CVSS 7.5), this vulnerability
An issue in the Unmarshal function in Go-Yaml v3 causes the program to crash when attempting to deserialize invalid inpu
Out-of-bounds read in the Perl module YAML::Syck before 1.47 lets a remote attacker leak adjacent process memory by feed
A critical heap buffer overflow vulnerability exists in YAML::Syck through version 1.36 for Perl, allowing remote attack
Heap use-after-free in YAML::Syck for Perl before version 1.47 lets a crafted YAML document corrupt parser memory when i
Out-of-bounds heap read in YAML::Syck before 1.47 for Perl lets an attacker who controls a parsed YAML document trigger
Parsing malicious or large YAML documents can consume excessive amounts of CPU or memory. Rated high severity (CVSS 7.5)
Buffer underflow in YAML::Syck for Perl versions before 1.38 allows remote unauthenticated attackers to trigger out-of-b
Out-of-bounds memory read in YAML::Syck's bundled libsyck C library for Perl exposes any application calling Load() or L
YAML::Syck before version 1.47 crashes the Perl interpreter when parsing a YAML document that redefines an anchor name,
GitHub PoC
Exploit-DB