This function can return a pointer to memory outside of the buffer to be searched. Subsequent operations on the pointer can have unintended consequences.
[1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A5 Buffer Overflow
[2] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3510 CAT I
[3] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 466
[4] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.3.1.1
[5] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.2
[6] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.5
[7] Standards Mapping - SANS Top 25 2009 - (SANS 2009) Risky Resource Management - CWE ID 119
[8] M. Howard, D. LeBlanc Writing Secure Code, Second Edition Microsoft Press