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CURL-CVE-2017-1000100
No affected components available
When doing a TFTP transfer and curl/libcurl is given a URL that contains a
long filename (longer than about 515 bytes), the filename is truncated to fit
within the buffer boundaries, but the buffer size is still wrongly updated
to use the original length. This too large value is then used in the
sendto() call, making curl attempt to send more data than what is actually
put into the buffer. The sendto() function then reads beyond the end of the
heap based buffer.
A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to
a crafted TFTP URL (if the client has not restricted which protocols it allows
redirects to) and trick it to send private memory contents to a remote server
over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's
with CURLOPT_REDIR_PROTOCOLS.
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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