Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2018-25110
CVE-2018-25110:
Linux Debian vulnerability analysis and mitigation
Overview
Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in several regular expressions used for parsing HTML tags and markdown links. This vulnerability was discovered and reported by security researchers (GitHub Issue).
Technical details
The vulnerability stems from improper regular expressions that can cause catastrophic backtracking when parsing HTML tags and markdown links. Two specific regex patterns were identified as vulnerable: one for parsing HTML closing tags and another for parsing nolink markdown syntax. The vulnerability can be triggered by providing specially crafted input with deeply nested or repetitively structured brackets or tag attributes (GitHub PR).
Impact
When exploited, this vulnerability can cause the parser to hang and lead to a Denial of Service condition. This is particularly concerning for server-side implementations where the marked library processes user-provided markdown input (GitHub Issue).
Mitigation and workarounds
The vulnerability was fixed in version 0.3.17 by modifying the problematic regular expressions to prevent catastrophic backtracking. Users should upgrade to version 0.3.17 or later to receive the security fix (GitHub PR).
Additional resources
Source: This report was generated using AI
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