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Allocate sufficient space when copying a null-terminated byte string from a source to a destination array. Remember to allocate sufficient space to store the string contents as well as the null-termination character.

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Risk Assessment

Copying data to a buffer that is too small to hold that data results in a buffer overflow. Attackers can use this to execute arbitrary code.

Rule

Severity

Likelihood

Remediation Cost

Priority

Level

STR32-C

3 (medium)

3 (probable)

2 (medium)

P18

L1

References

  • ISO/IEC 9899-1999 Sections 7.1.1 Definitions of terms, Section 7.21 String handling <string.h>, 5.1.2.2.1 Program startup, 7.20.4.5 The getenv function
  • Seacord 05 Chapter 2 Strings
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