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Fencer Intel
high 7.5

CVE-2017-16227 in the critical feed json

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…

published 2017-10-29 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-7426

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
46.0%
EPSS 46.0% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • quagga Ubuntu 14.04 LTS 0.99.22.4-3ubuntu1.4
  • quagga Ubuntu 16.04 LTS 0.99.24.1-2ubuntu1.3

ubuntu advisories UBUNTU-CVE-2017-16227

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • quagga SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 0.99.15-0.30.3.1
  • quagga SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +4 more 1.1.1-17.7.1
  • quagga SLES for SAP 12 SP1, SLES 12-LTSS, SLES 12 SP1-LTSS +1 more 0.99.22.1-16.4.1

suse advisories SUSE-SU-2018:0457-1SUSE-SU-2018:0456-1SUSE-SU-2018:0455-1

  • quagga openSUSE Tumbleweed 1.2.4-2.14

opensuse advisories openSUSE-SU-2024:11290-1

  • quagga Alpine 3.3 0.99.24.1-r6
  • quagga Alpine 3.4 1.0.20161017-r1
  • quagga Alpine 3.5 1.1.1-r1
  • quagga Alpine 3.6 1.2.2-r0

alpine advisories ALPINE-CVE-2017-16227

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-16227 updated cvss 3.7

quagga: Incorrect AS_PATH size calculation for long paths

  • Red Hat Enterprise Linux 6 quagga, quagga-contrib Red Hat Enterprise Linux 7 quagga, quagga-contrib
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 quagga
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

45.96% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.