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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| id: dont-call-system-c | ||
| language: c | ||
| severity: warning | ||
| message: >- | ||
| Don't call `system`. It's a high-level wrapper that allows for stacking | ||
| multiple commands. Always prefer a more restrictive API such as calling | ||
| `execve` from the `exec` family. | ||
| note: >- | ||
| [CWE-78] Improper Neutralization of Special Elements used in an OS | ||
| Command ('OS Command Injection'). | ||
| [REFERENCES] | ||
| - https://owasp.org/Top10/A03_2021-Injection | ||
| utils: | ||
| PATTERN_SYSTEM: | ||
| kind: call_expression | ||
| all: | ||
| - has: | ||
| stopBy: neighbor | ||
| kind: identifier | ||
| regex: "^system$" | ||
| - has: | ||
| stopBy: neighbor | ||
| kind: argument_list | ||
| rule: | ||
| kind: call_expression | ||
| matches: PATTERN_SYSTEM |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| id: dont-call-system-cpp | ||
| language: cpp | ||
| severity: warning | ||
| message: >- | ||
| Don't call `system`. It's a high-level wrapper that allows for stacking | ||
| multiple commands. Always prefer a more restrictive API such as calling | ||
| `execve` from the `exec` family. | ||
| note: >- | ||
| [CWE-78] Improper Neutralization of Special Elements used in an OS | ||
| Command ('OS Command Injection'). | ||
| [REFERENCES] | ||
| - https://owasp.org/Top10/A03_2021-Injection | ||
| utils: | ||
| PATTERN_SYSTEM: | ||
| kind: call_expression | ||
| all: | ||
| - has: | ||
| stopBy: neighbor | ||
| kind: identifier | ||
| regex: "^system$" | ||
| - has: | ||
| stopBy: neighbor | ||
| kind: argument_list | ||
| rule: | ||
| kind: call_expression | ||
| matches: PATTERN_SYSTEM | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| id: dont-call-system-c | ||
| snapshots: | ||
| ? | | ||
| void test_002(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| system(cmdbuf); | ||
| } | ||
| void test_001(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| if (len_wanted >= BUFFERSIZE) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (len_wanted < 0) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (system(cmdbuf) == -1) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| } | ||
| : labels: | ||
| - source: system(cmdbuf) | ||
| style: primary | ||
| start: 156 | ||
| end: 170 | ||
| - source: system | ||
| style: secondary | ||
| start: 156 | ||
| end: 162 | ||
| - source: (cmdbuf) | ||
| style: secondary | ||
| start: 162 | ||
| end: 170 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| id: dont-call-system-cpp | ||
| snapshots: | ||
| ? | | ||
| void test_002(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| system(cmdbuf); | ||
| } | ||
| void test_001(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| if (len_wanted >= BUFFERSIZE) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (len_wanted < 0) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (system(cmdbuf) == -1) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| } | ||
| : labels: | ||
| - source: system(cmdbuf) | ||
| style: primary | ||
| start: 156 | ||
| end: 170 | ||
| - source: system | ||
| style: secondary | ||
| start: 156 | ||
| end: 162 | ||
| - source: (cmdbuf) | ||
| style: secondary | ||
| start: 162 | ||
| end: 170 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| id: dont-call-system-c | ||
| valid: | ||
| - | | ||
| void test_003(const char *input) | ||
| { | ||
| storer->store_binary(Clocks->system()); | ||
| } | ||
| invalid: | ||
| - | | ||
| void test_002(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| system(cmdbuf); | ||
| } | ||
| void test_001(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| if (len_wanted >= BUFFERSIZE) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (len_wanted < 0) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (system(cmdbuf) == -1) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| id: dont-call-system-cpp | ||
| valid: | ||
| - | | ||
| void test_003(const char *input) | ||
| { | ||
| storer->store_binary(Clocks->system()); | ||
| } | ||
| invalid: | ||
| - | | ||
| void test_002(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| system(cmdbuf); | ||
| } | ||
| void test_001(const char *input) | ||
| { | ||
| char cmdbuf[BUFFERSIZE]; | ||
| int len_wanted = snprintf(cmdbuf, BUFFERSIZE, | ||
| "any_cmd '%s'", input); | ||
| if (len_wanted >= BUFFERSIZE) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (len_wanted < 0) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| else if (system(cmdbuf) == -1) | ||
| { | ||
| /* Handle error */ | ||
| } | ||
| } |
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