CVE-2018-0273
First published: Thu Apr 19 2018(Updated: )
A vulnerability in the IPsec Manager of Cisco StarOS for Cisco Aggregation Services Router (ASR) 5000 Series Routers and Virtualized Packet Core (VPC) System Software could allow an unauthenticated, remote attacker to terminate all active IPsec VPN tunnels and prevent new tunnels from being established, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of corrupted Internet Key Exchange Version 2 (IKEv2) messages. An attacker could exploit this vulnerability by sending crafted IKEv2 messages toward an affected router. A successful exploit could allow the attacker to cause the ipsecmgr service to reload. A reload of this service could cause all IPsec VPN tunnels to be terminated and prevent new tunnels from being established until the service has restarted, resulting in a DoS condition. This vulnerability affects the following Cisco products when they are running Cisco StarOS: Cisco Aggregation Services Router (ASR) 5000 Series Routers, Virtualized Packet Core (VPC) System Software. Cisco Bug IDs: CSCve29605.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco StarOS | =19.4.2.65120 | |
| Cisco StarOS | =19.6.0 | |
| Cisco StarOS | =21.2.0 | |
| Cisco StarOS | =21.2.6 | |
| Cisco StarOS | =21.4.0 | |
| Cisco ASR 5000 | ||
| Cisco ASR 5500 | ||
| Cisco Asr 5700 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-0273?
The severity of CVE-2018-0273 is medium with a CVSS score of 5.3.
How does the vulnerability in CVE-2018-0273 affect Cisco StarOS?
The vulnerability in CVE-2018-0273 affects Cisco StarOS versions 19.4.2.65120, 19.6.0, 21.2.0, 21.2.6, and 21.4.0.
What is the impact of CVE-2018-0273?
CVE-2018-0273 allows an unauthenticated attacker to terminate all active IPsec VPN tunnels and prevent new tunnels from being established.
How can I fix CVE-2018-0273?
Apply the necessary updates provided by Cisco to fix CVE-2018-0273.
Where can I find more information about CVE-2018-0273?
More information about CVE-2018-0273 can be found on the Cisco Security Advisory page and the SecurityFocus and SecurityTracker websites.
- collector/nvd-index
- agent/weakness
- agent/tags
- agent/event
- agent/references
- agent/severity
- agent/author
- agent/type
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/cisco
- canonical/cisco staros
- version/cisco staros/19.4.2.65120
- version/cisco staros/19.6.0
- version/cisco staros/21.2.0
- version/cisco staros/21.2.6
- version/cisco staros/21.4.0
- canonical/cisco asr 5000
- canonical/cisco asr 5500
- canonical/cisco asr 5700