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Info

Information for Editors
In order to have a new guideline automatically listed above be sure to label it env and rule.

Risk Assessment Summary

Rule

Severity

Likelihood

Detectable

Repairable

Priority

Level

ENV30-CLowProbableNoNo

P2

L3

ENV31-CLowProbableYesNo

P4

L3

ENV32-CMediumLikelyYesNo

P12

L1

ENV33-CHighProbableYesNo

P12

L1

ENV34-CLowProbableYesNo

P4

This section identifies rules and recommendations related to the functions defined in C99 Section 7.20.4, "Communication with the environment".

Recommendations

ENV00-A. Do not store the pointer to the string returned by getenv()

ENV01-A. Do not make assumptions about the size of an environment variable

ENV02-A. Beware of multiple environment variables with the same name

ENV03-A. Sanitize the environment before invoking external programs

ENV04-A. Do not call system() if you do not need a command processor

Rules

ENV30-C. Do not modify the string returned by getenv()

ENV31-C. Do not rely on an environment pointer following an operation that may invalidate it

ENV32-C. Do not call the exit() function more than once

ENV33-C. Do not call the longjmp function to terminate a call to a function registered by atexit()

Risk Assessment Summary

Recommendation

Severity

Likelihood

Remediation Cost

Priority

Level

ENV00-A

1 (low)

1 (unlikely)

2 (medium)

P2

L3

ENV01-A

3 (high)

3 (unlikely)

3 (low)

P27

L1

ENV02-A

2 (medium)

1 (unlikely)

3 (low)

P6

L2

ENV03-A

2 (medium)

2 (probable)

2 (medium)

P8

L2

ENV04-A

3 (high)

2 (probable)

2 (medium)

P12

L1

Rule

Severity

Likelihood

Remediation Cost

Priority

Level

ENV30-C

1 (low)

1 (unlikely)

3 (low)

P3

L3

ENV31-C

1 (low)

1 (unlikely)

3 (low)

P3

L3

ENV32-C

1 (low)

1 (unlikely)

3 (low)

P3

L3

ENV33-C

1 (low)

1 (unlikely)

3 (low)

P3

L3

Related Rules and Recommendations

Navigation Map
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TMP33-C. Temporary files must be removed before the program exits      10. Temporary Files (TMP)       ENV00-A. Do not store the pointer to the string returned by getenv()Image Added Image Added Image Added