9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.171 Low
EPSS
Percentile
96.0%
curl 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 buffer overflow
libcurl contains a stack based buffer overflow vulnerability.
The function creating an outgoing NTLM type-3 header
(lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates 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
response header.
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.
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.171 Low
EPSS
Percentile
96.0%