CVE-2017-18342 describes a critical deserialization vulnerability in PyYAML versions prior to 5.1, where the yaml.load() API could execute arbitrary code when processing untrusted data. This flaw impacts various Fedora Project distributions and PyYAML itself. With a CVSS score of 9.8 (CRITICAL), this vulnerability presents a significant risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, organizations using affected PyYAML versions should prioritize upgrading to mitigate this severe risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.1CPE matchmatch criteria | cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:* | ||
28CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* | ||
29CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* | ||
30CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.