CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
56.1%
An issue was discovered in Suricata before 6.0.4. It is possible to
bypass/evade any HTTP-based signature by faking an RST TCP packet with
random TCP options of the md5header from the client side. After the
three-way handshake, it’s possible to inject an RST ACK with a random TCP
md5header option. Then, the client can send an HTTP GET request with a
forbidden URL. The server will ignore the RST ACK and send the response
HTTP packet for the client’s request. These packets will not trigger a
Suricata reject action.
forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942
github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df
github.com/OISF/suricata/releases
launchpad.net/bugs/cve/CVE-2021-45098
nvd.nist.gov/vuln/detail/CVE-2021-45098
redmine.openinfosecfoundation.org/issues/4710
security-tracker.debian.org/tracker/CVE-2021-45098
www.cve.org/CVERecord?id=CVE-2021-45098
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
56.1%