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CURL-CVE-2016-8618
No affected components available
The libcurl API function called curl_maprintf() can be tricked into doing a
double free due to an unsafe size_t multiplication, on systems using 32-bit
size_t variables. The function is also used internally in numerous
situations.
The function doubles an allocated memory area with realloc() and allows the size to wrap and become zero and when doing so realloc() returns NULL and frees the memory - in contrary to normal realloc() fails where it only returns NULL - causing libcurl to free the memory again in the error path.
Systems with 64-bit versions of the size_t type are not affected by this
issue.
This behavior can be triggered using the publicly exposed function.
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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