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Loop with Unreachable Exit Condition ('Infinite Loop') Affecting quagga package, versions <0:0.99.22.4-4.17.amzn1

Severity

 Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
30.16% (99th percentile)

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  • Snyk IDSNYK-AMZN201803-QUAGGA-1710466
  • published27 Sept 2021
  • disclosed19 Feb 2018
Report a new vulnerability Found a mistake?

Introduced: 19 Feb 2018

CVE-2018-5381  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 quagga to version 0:0.99.22.4-4.17.amzn1 or higher.
This issue was patched in ALAS-2018-957.

NVD Description

Note: Versions mentioned in the description apply only to the upstream quagga package and not the quagga package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The Quagga BGP daemon (bgpd) prior to version 1.2.3 has a bug in its parsing of "Capabilities" in BGP OPEN messages, in the bgp_packet.c:bgp_capability_msg_parse function. The parser can enter an infinite loop on invalid capabilities if a Multi-Protocol capability does not have a recognized AFI/SAFI, causing a denial of service.