CVE-2023-20070
First published: Wed Nov 01 2023(Updated: )
A vulnerability in the TLS 1.3 implementation of the Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart. This vulnerability is due to a logic error in how memory allocations are handled during a TLS 1.3 session. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a crafted TLS 1.3 message sequence through an affected device. A successful exploit could allow the attacker to cause the Snort 3 detection engine to reload, resulting in a denial of service (DoS) condition. While the Snort detection engine reloads, packets going through the FTD device that are sent to the Snort detection engine will be dropped. The Snort detection engine will restart automatically. No manual intervention is required.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | =7.2.0 | |
| Cisco Firepower Threat Defense | =7.2.0.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-20070?
CVE-2023-20070 is a vulnerability in the TLS 1.3 implementation of the Cisco Firepower Threat Defense (FTD) Software.
What is the severity of CVE-2023-20070?
The severity of CVE-2023-20070 is medium with a severity value of 4.
How does CVE-2023-20070 affect Cisco Firepower Threat Defense?
CVE-2023-20070 allows an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart.
What is the affected software version of CVE-2023-20070?
The affected software versions of CVE-2023-20070 are Cisco Firepower Threat Defense 7.2.0 and 7.2.0.1.
How can I fix CVE-2023-20070?
To fix CVE-2023-20070, it is recommended to upgrade to a fixed software release.
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- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/7.2.0
- version/cisco firepower threat defense/7.2.0.1