Vulnerability in Cisco Firepower Threat Defense Software
CVE-2022-20940
A vulnerability in the TLS handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to gain access to sensitive information. This vulnerability is due to improper implementation of countermeasures against a Bleichenbacher attack on a device that uses SSL decryption policies. An attacker could exploit this vulnerability by sending crafted TLS messages to an affected device, which would act as an oracle and allow the attacker to carry out a chosen-ciphertext attack. A successful exploit could allow the attacker to perform cryptanalytic operations that may allow decryption of previously captured TLS sessions to the affected device.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Firepower Threat Defense — versions 6.6.0, 6.6.0.1, 6.6.1
- Cisco Secure Firewall Threat Defense — versions 6.6.0, 6.6.0.1, 6.6.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2022-20940?
- CVE-2022-20940 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2022-11-15.
- How severe is CVE-2022-20940?
- Medium severity. CVSS v3 base score is 5.3 out of 10.