Improper Input Validation Affecting quagga package, versions <1.1.1-3+deb9u1


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    1.12% (85th percentile)

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  • Snyk ID SNYK-DEBIAN9-QUAGGA-319707
  • published 29 Oct 2017
  • disclosed 29 Oct 2017

How to fix?

Upgrade Debian:9 quagga to version 1.1.1-3+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream quagga package and not the quagga package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

The aspath_put function in bgpd/bgp_aspath.c in Quagga before 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDATE messages, because AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message.