cisco-sa-20190327-ipsla-dos: Cisco IOS and IOS XE Software IP Service Level Agreement Denial of Service Vulnerability
First published: Wed Mar 27 2019(Updated: )
A vulnerability in the processing of IP Service Level Agreement (SLA) packets by Cisco IOS Software and Cisco IOS XE software could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service (DoS) condition on the affected device. The vulnerability is due to improper socket resources handling in the IP SLA responder application code. An attacker could exploit this vulnerability by sending crafted IP SLA packets to an affected device. An exploit could allow the attacker to cause an interface to become wedged, resulting in an eventual denial of service (DoS) condition on the affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-ipsla-dos This advisory is part of the March 27, 2019, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 17 Cisco Security Advisories that describe 19 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: March 2019 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | ||
| Cisco IOS XE Software |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190327-ipsla-dos?
The cisco-sa-20190327-ipsla-dos vulnerability is considered to have a high severity rating due to its potential to cause a denial of service condition.
How do I fix cisco-sa-20190327-ipsla-dos?
To fix the cisco-sa-20190327-ipsla-dos vulnerability, you should upgrade to the latest Cisco IOS or IOS XE software that has mitigations applied.
What can an attacker do with cisco-sa-20190327-ipsla-dos?
An attacker exploiting cisco-sa-20190327-ipsla-dos can cause an interface wedge and initiate a denial of service on the affected Cisco device.
Which software is affected by cisco-sa-20190327-ipsla-dos?
The cisco-sa-20190327-ipsla-dos vulnerability affects Cisco IOS Software and Cisco IOS XE Software.
Is authentication required to exploit cisco-sa-20190327-ipsla-dos?
No, cisco-sa-20190327-ipsla-dos can be exploited by an unauthenticated remote attacker.
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