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CURL-CVE-2018-14618
No affected components available
libcurl contains a buffer overrun in the NTLM authentication code.
The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of
the password by two (SUM) to figure out how large temporary storage area to
allocate from the heap.
The length value is then subsequently used to iterate over the password and
generate output into the allocated storage buffer. On systems with a 32-bit
size_t, the math to calculate SUM triggers an integer overflow when the
password length exceeds 2GB (2^31 bytes). This integer overflow usually causes
a tiny buffer to actually get allocated instead of the intended huge one,
making the use of that buffer end up in a heap buffer overflow.
(This bug is almost identical to CVE-2017-8816.)
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 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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