The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.
CVE-2013-6393 is a security vulnerability that . Impacting 6 products from pyyaml, from canonical, from redhat and 3 others, organizations running these solutions should prioritize assessment and patching.
Documented in 2014, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.
2014-02-06T22:55:03.217
2025-04-11T00:51:21.963
Deferred
CVSSv2: 6.8 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | pyyaml | libyaml | ≤ 0.1.4 | Yes |
| Application | pyyaml | libyaml | 0.0.1 | Yes |
| Application | pyyaml | libyaml | 0.1.1 | Yes |
| Application | pyyaml | libyaml | 0.1.2 | Yes |
| Application | pyyaml | libyaml | 0.1.3 | Yes |
| Operating System | canonical | ubuntu_linux | 12.04 | Yes |
| Operating System | canonical | ubuntu_linux | 12.10 | Yes |
| Operating System | canonical | ubuntu_linux | 13.10 | Yes |
| Application | redhat | openstack | 3.0 | Yes |
| Application | redhat | openstack | 4.0 | Yes |
| Operating System | debian | debian_linux | 6.0 | Yes |
| Operating System | debian | debian_linux | 7.0 | Yes |
| Operating System | opensuse | leap | 42.1 | Yes |
| Operating System | opensuse | opensuse | 11.4 | Yes |
| Operating System | opensuse | opensuse | 13.1 | Yes |
| Operating System | opensuse | opensuse | 13.2 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For pyyaml's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.