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
0.003 Low
EPSS
Percentile
70.4%
The curl team reports:
This flaw makes curl overflow a heap based buffer in the
SOCKS5 proxy handshake. When curl is asked to pass along
the hostname to the SOCKS5 proxy to allow that to resolve
the address instead of it getting done by curl itself, the
maximum length that hostname can be is 255 bytes. If the
hostname is detected to be longer than 255 bytes, curl
switches to local name resolving and instead passes on the
resolved address only to the proxy. Due to a bug, the
local variable that means âlet the host resolve the nameâ
could get the wrong value during a slow SOCKS5 handshake,
and contrary to the intention, copy the too long hostname
to the target buffer instead of copying just the resolved
address there.
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
0.003 Low
EPSS
Percentile
70.4%