CVE-2015-4199
Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices, aka Bug ID CSCug47366.
- CVSS 2.0
- 7.1 HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C
- EPSS
- 2.12% probability · 81th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- cisco/ios
- Source
- psirt@cisco.com
References
- http://tools.cisco.com/security/center/viewAlert.x?alertId=39423Vendor Advisory
- http://www.securityfocus.com/bid/75335Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1032692Third Party Advisory, VDB Entry
- http://tools.cisco.com/security/center/viewAlert.x?alertId=39423Vendor Advisory
- http://www.securityfocus.com/bid/75335Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1032692Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.