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Regular expressions are widely used to match strings of text. For example, the POSIX {{grep}} utility supports regular expressions for finding patterns in the specified text. For introductory information on regular expressions, see the Java Tutorials \[[Tutorials 08|AA. Bibliography#Tutorials 08]\]. The {{java.util.regex}} package provides the {{Pattern}} class that encapsulates a compiled representation of a regular expression and the {{Matcher}} class that is an engine that uses a {{Pattern}} to perform matching operations on a {{CharacterSequenceCharSequence}}. |
Java's powerful regular expression (regex) facilities must be protected from misuse. An attacker may supply a malicious input that modifies the original regular expression in such a way that the regex fails to comply with the program's specification. This attack vector, referred to as a regex injection, might affect control flow, cause information leaks, or result in denial-of-service vulnerabilities (DoS).
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="f6a2b94be5e5f554-fed3ad13-42714154-924db1d3-d10d78eee3db9d1e5c93996a"><ac:plain-text-body><![CDATA[ | [[CVE 05 | AA. Bibliography#CVE]] | [CVE-2005-1949 | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1949] | ]]></ac:plain-text-body></ac:structured-macro> |
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