CVE-2020-3179: cisco asa_5505_firmware Double Free
Vulnerability summary
CVE-2020-3179 is a high (CVSS 8.6) Double Free vulnerability in cisco asa_5505_firmware. EPSS estimates a 2.00% chance of exploitation in the next 30 days, higher than 80.4% of scored vulnerabilities.
Timeline
- 06-05-2020PublishedVulnerability first disclosed.
- 15-11-2024Last modifiedVulnerability information updated.
Description
A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a memory handling error when GRE over IPv6 traffic is processed. An attacker could exploit this vulnerability by sending crafted GRE over IPv6 packets with either IPv4 or IPv6 payload through an affected device. A successful exploit could allow the attacker to cause the device to crash, resulting in a DoS condition.
CVSS metrics
4 scores · 2 sources · 3 versions- NVDNIST8.6HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
2.00%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
+0.07 pp
From 1.93% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco14 products
- asa_5505_firmware9.9\(2\) | 101.5\(1.26\)
- asa_5510_firmware9.9\(2\) | 101.5\(1.26\)
- asa_5512-x_firmware9.9\(2\) | 101.5\(1.26\)
- asa_5515-x_firmware9.9\(2\) | 101.5\(1.26\)
- asa_5520_firmware9.9\(2\) | 101.5\(1.26\)
1 vendor · 14 products
References
1 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-2-sS2h7aWeVendor AdvisoryX Refsource CISCO