CVE-2006-0459: westes flex

Vulnerability summary

CVE-2006-0459 is a high (CVSS 7.5) vulnerability in westes flex. EPSS estimates a 4.71% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.

Timeline

1. 29-03-2006
   PublishedVulnerability first disclosed.
2. 07-08-2024
   Last modifiedVulnerability information updated.

Description

flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.