In some cases, the `tcp-setmss` handler may free the packet data and throw an error without halting the rule processing engine. A subsequent rule can then allow the traffic after the packet data is gone, resulting in a NULL pointer dereference.
Maliciously crafted packets sent from a remote host may result in a Denial of Service (DoS) if the `tcp-setmss` directive is used and a subsequent rule would allow the traffic to pass.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 15
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*
|
— | — |
|
Freebsd Freebsd
cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*
|
— | — |