—–BEGIN PGP SIGNED MESSAGE—–
Hash: SHA1
Cisco Security Advisory: Cisco IOS XR Software BGP MPLS-Based EVPN Denial of Service Vulnerability
Advisory ID: cisco-sa-20190515-iosxr-evpn-dos
Revision: 1.0
For Public Release: 2019 May 15 16:00 GMT
Last Updated: 2019 May 15 16:00 GMT
CVE ID(s): CVE-2019-1849
CVSS Score v(3): 7.4 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
+———————————————————————
Summary
=======
A vulnerability in the Border Gateway Patrol (BGP) Multiprotocol Label Switching (MPLS)-based Ethernet VPN (EVPN) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device.
The vulnerability is due to a logic error that occurs when the affected software processes specific EVPN routing information. An attacker could exploit this vulnerability by injecting malicious traffic patterns into the targeted EVPN network.
A successful exploit could result in a crash of the l2vpn_mgr process on Provider Edge (PE) device members of the same EVPN instance (EVI). On each of the affected devices, a crash could lead to system instability and the inability to process or forward traffic through the device, resulting in a DoS condition that would require manual intervention to restore normal operating conditions.
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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-iosxr-evpn-dos [“https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-iosxr-evpn-dos”]
—–BEGIN PGP SIGNATURE—–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=zgqx
—–END PGP SIGNATURE—–
_______________________________________________
cust-security-announce mailing list
cust-security-announce@cisco.com
To unsubscribe, send the command “unsubscribe” in the subject of your message to cust-security-announce-leave@cisco.com
