Vulnerability Details : CVE-2015-4321
The Unicast Reverse Path Forwarding (uRPF) implementation in Cisco Adaptive Security Appliance (ASA) Software 9.3(1.50), 9.3(2.100), 9.3(3), and 9.4(1) mishandles cases where an IP address belongs to an internal interface but is also in the ASA routing table, which allows remote attackers to bypass uRPF validation via spoofed packets, aka Bug ID CSCuv60724.
Products affected by CVE-2015-4321
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(2.100\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(3\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(1.50\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.4\(1\):*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-4321
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 44 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-4321
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2015-4321
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-4321
-
http://www.securitytracker.com/id/1033265
Cisco ASA Lets Remote Users Bypass uRPF Validation on the Target System - SecurityTracker
-
http://tools.cisco.com/security/center/viewAlert.x?alertId=40440
Cisco ASA Unicast Reverse Path Forwarding (uRPF) Bypass VulnerabilityVendor Advisory
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