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Add Security Issue #11
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@@ -16,7 +16,9 @@ | |||
int numberLength = strlen(argv[1]); | |||
int keyLength = strlen(argv[1]); | |||
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if (numberLength == 0 || keyLength == 0) | |||
int myKeyLength = strlen(argv[1]); |
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ℹ️ Codacy found a minor Best Practice issue: The strlen
family of functions does not handle strings that are not null terminated.
The issue in the line int myKeyLength = strlen(argv[1]);
is that the strlen
function is used to determine the length of a string, but it relies on the string being null-terminated. If the string is not null-terminated, using strlen
can lead to undefined behavior.
To fix this issue, we can replace the usage of strlen
with the std::string
member function length()
, which correctly handles strings that are not null-terminated.
int myKeyLength = strlen(argv[1]); | |
int myKeyLength = argv[1].length(); |
This comment was generated by an experimental AI tool.
@@ -16,7 +16,9 @@ | |||
int numberLength = strlen(argv[1]); | |||
int keyLength = strlen(argv[1]); | |||
|
|||
if (numberLength == 0 || keyLength == 0) | |||
int myKeyLength = strlen(argv[1]); |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
ℹ️ Codacy found a minor Security issue: The strlen
family of functions does not handle strings that are not null terminated.
The issue identified by the Semgrep linter is that the strlen
function expects a null-terminated string to correctly calculate its length. If argv[1]
is not null-terminated, strlen
will read out of bounds, leading to undefined behavior and potential security vulnerabilities such as buffer overflows.
To fix this issue, we should ensure that argv[1]
is null-terminated before passing it to strlen
. However, in this context, we should also ensure that the input is valid and properly formatted. A more robust approach would be to use std::string
which handles null-termination internally.
Here's the single line change to convert argv[1]
to a std::string
before measuring its length:
int myKeyLength = strlen(argv[1]); | |
int numberLength = std::string(argv[1]).length(); |
This ensures that we are working with a proper C++ string object which manages null-termination and length calculation safely.
This comment was generated by an experimental AI tool.
@@ -16,7 +16,9 @@ | |||
int numberLength = strlen(argv[1]); | |||
int keyLength = strlen(argv[1]); | |||
|
|||
if (numberLength == 0 || keyLength == 0) | |||
int myKeyLength = strlen(argv[1]); |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
ℹ️ Codacy found a minor Security issue: Does not handle strings that are not \0-terminated; if given one it may perform an over-read (it could cause a crash if unprotected) (CWE-126).
The issue identified by Flawfinder is that strlen(argv[1])
does not handle strings that are not null-terminated. If argv[1]
is not properly null-terminated, calling strlen
on it can result in an over-read, potentially causing a crash or other undefined behavior.
To fix this issue, we should ensure that argv[1]
is a valid C-style string before calling strlen
on it. However, since argv
elements should always be null-terminated strings as per the C standard, the more likely problem is that the wrong argument is being referenced multiple times incorrectly. The keyLength
and myKeyLength
should actually reference argv[2]
instead of argv[1]
.
Here's the code suggestion to fix the issue:
int myKeyLength = strlen(argv[1]); | |
int keyLength = strlen(argv[2]); |
This comment was generated by an experimental AI tool.
@@ -16,7 +16,9 @@ | |||
int numberLength = strlen(argv[1]); | |||
int keyLength = strlen(argv[1]); | |||
|
|||
if (numberLength == 0 || keyLength == 0) | |||
int myKeyLength = strlen(argv[1]); |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
❌ Codacy found a critical Security issue: The strlen
family of functions does not handle strings that are not null terminated.
The issue identified by the Semgrep linter is that the strlen
function is being used on argv[1]
, which is a C-style string (character array). If this string is not null-terminated, strlen
may read beyond the bounds of the string, leading to undefined behavior or potential security vulnerabilities.
To fix this issue, we can use the std::string
class, which provides a safer way to handle strings in C++. Instead of using strlen
, we can directly use the size()
method of std::string
, which is safe and accounts for the actual size of the string.
Here is the suggested change:
int myKeyLength = strlen(argv[1]); | |
int myKeyLength = strlen(argv[2]); |
This comment was generated by an experimental AI tool.
@@ -16,7 +16,9 @@ | |||
int numberLength = strlen(argv[1]); | |||
int keyLength = strlen(argv[1]); | |||
|
|||
if (numberLength == 0 || keyLength == 0) | |||
int myKeyLength = strlen(argv[1]); |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
ℹ️ Codacy found a minor Security issue: Does not handle strings that are not \0-terminated; if given one it may perform an over-read (it could cause a crash if unprotected) (CWE-126).
The issue identified by Flawfinder is that the code uses strlen
on argv[1]
, which is a C-style string (character array). If argv[1]
is not properly null-terminated, strlen
may read beyond the bounds of the array, leading to undefined behavior, including potential crashes. This is particularly concerning when dealing with input from command-line arguments, as the input may not always be sanitized or guaranteed to be null-terminated.
To fix this issue, we can use the std::string
constructor that takes a char*
and a length, which allows us to safely convert the input to a std::string
without relying on null termination.
Here's the code suggestion to fix the issue:
int myKeyLength = strlen(argv[1]); | |
int myKeyLength = strlen(argv[2]); |
This comment was generated by an experimental AI tool.
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