Interpretation Conflict Affecting frrouting/frr package, versions [,3.0.4)[5.0,5.0.2)[6.0,6.0.2)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
3.6% (88th percentile)

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  • Snyk IDSNYK-UNMANAGED-FRROUTINGFRR-2365062
  • published26 Jan 2022
  • disclosed10 Jan 2019
  • creditUnknown

Introduced: 10 Jan 2019

CVE-2019-5892  (opens in a new tab)
CWE-436  (opens in a new tab)

How to fix?

Upgrade frrouting/frr to version 3.0.4, 5.0.2, 6.0.2 or higher.

Overview

Affected versions of this package are vulnerable to Interpretation Conflict bgpd in FRRouting FRR (aka Free Range Routing) 2.x and 3.x before 3.0.4, 4.x before 4.0.1, 5.x before 5.0.2, and 6.x before 6.0.2 (not affecting Cumulus Linux or VyOS), when ENABLE_BGP_VNC is used for Virtual Network Control, allows remote attackers to cause a denial of service (peering session flap) via attribute 255 in a BGP UPDATE packet. This occurred during Disco in January 2019 because FRR does not implement RFC 7606, and therefore the packets with 255 were considered invalid VNC data and the BGP session was closed.

CVSS Base Scores

version 3.1