Vulnerability identifier: #VU1135
Vulnerability risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco ASR 5000 Series
Hardware solutions /
Firmware
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to insufficient input validation. By sending a specially crafted IPv4 or IPv6 fragmented packets, a remote attacker is able to trigger a flaw in the Slowpath of StarOS for ASR 5500 Series devices with Data Processing Card 2 (DPC2) and reload of the sessmgr service.
Successful exploitation of the vulnerability results in denial of service.
Mitigation
Update fixed versions from the vendor's website.
Vulnerable software versions
Cisco ASR 5000 Series: 18.7.4 - 21.2.A0.65147
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161102-asr
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.