CVE-2021-1224
Published: 13 January 2021
Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.
Notes
| Author | Note |
|---|---|
| yomonokio | There is no access to the actual fix for this CVE nor workarounds that address this vulnerability |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
snort Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| focal |
Needed
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needed
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Ignored
(end of life, was needed)
|
|
| noble |
Not vulnerable
(2.9.17)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(2.9.17)
|
|
| xenial |
Needed
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |