FreeBSD : curl -- multiple vulnerabilities (714b033a-2b09-11e9-8bc3-610fd6e6cd05)
High Nessus Plugin ID 122042
SynopsisThe remote FreeBSD host is missing a security-related update.
Descriptioncurl security problems :
CVE-2018-16890: NTLM type-2 out-of-bounds buffer read
libcurl contains a heap buffer out-of-bounds read flaw.
The function handling incoming NTLM type-2 messages
(lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming
data correctly and is subject to an integer overflow vulnerability.
Using that overflow, a malicious or broken NTLM server could trick
libcurl to accept a bad length + offset combination that would lead to
a buffer read out-of-bounds.
CVE-2019-3822: NTLMv2 type-3 header stack-based buffer overflow
libcurl contains a stack based buffer overflow vulnerability.
The function creating an outgoing NTLM type-3 header
the request HTTP header contents based on previously received data.
The check that exists to prevent the local buffer from getting
overflowed is implemented wrongly (using unsigned math) and as such it
does not prevent the overflow from happening.
This output data can grow larger than the local buffer if very large
'nt response' data is extracted from a previous NTLMv2 header provided
by the malicious or broken HTTP server.
Such a 'large value' needs to be around 1000 bytes or more. The actual
payload data copied to the target buffer comes from the NTLMv2 type-2
CVE-2019-3823: SMTP end-of-response out-of-bounds read
libcurl contains a heap out-of-bounds read in the code handling the
end-of-response for SMTP.
If the buffer passed to smtp_endofresp() isn't NUL terminated and
contains no character ending the parsed number, and len is set to 5,
then the strtol() call reads beyond the allocated buffer. The read
contents will not be returned to the caller.
SolutionUpdate the affected package.