Vulnerability Details CVE-2019-1849
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 33.3%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 6.1
References
Products affected by CVE-2019-1849
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cpe:2.3:o:cisco:ios_xr:6.1.0
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cpe:2.3:o:cisco:ios_xr:6.1.1
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cpe:2.3:o:cisco:ios_xr:6.1.2
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cpe:2.3:o:cisco:ios_xr:6.1.3
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cpe:2.3:o:cisco:ios_xr:6.1.3.01
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cpe:2.3:o:cisco:ios_xr:6.1.4
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cpe:2.3:o:cisco:ios_xr:6.1.4.base
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cpe:2.3:o:cisco:ios_xr:6.2.0
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cpe:2.3:o:cisco:ios_xr:6.2.1
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cpe:2.3:o:cisco:ios_xr:6.2.2
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cpe:2.3:o:cisco:ios_xr:6.2.25
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cpe:2.3:o:cisco:ios_xr:6.2.3
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cpe:2.3:o:cisco:ios_xr:6.2.3.base
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cpe:2.3:o:cisco:ios_xr:6.3.1
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cpe:2.3:o:cisco:ios_xr:6.3.2
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cpe:2.3:o:cisco:ios_xr:6.4.0
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cpe:2.3:o:cisco:ios_xr:6.4.1
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cpe:2.3:o:cisco:ios_xr:6.4.1_base
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cpe:2.3:o:cisco:ios_xr:6.5.0
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cpe:2.3:o:cisco:ios_xr:6.5.1
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cpe:2.3:o:cisco:ios_xr:6.6.0