CVE-2017-5495

highpriority · track · 37EPSS 0.188 · 97 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

18.8% (97th) EPSS

CVSS 7.8 · high

Is it mine?

38 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedquagga-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.src as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.src as a component of Red Hat Enterprise Linux Workstation (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-contrib-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.ppc as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.s390 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-debuginfo-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.ppc as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.s390 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794
Fixedquagga-devel-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.
https://access.redhat.com/errata/RHSA-2017:0794

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-770US

affected products (38)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
quagga quagga≤ 1.1.0nvdUScpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
quagga-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.src as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.src as a component of Red Hat Enterprise Linux Workstation (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6)all versionsfixedredhat_csafUS
quagga-contrib-0:0.99.15-14.el6.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)all versionsfixedredhat_csafUS
quagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6)all versionsfixedredhat_csafUS
quagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)all versionsfixedredhat_csafUS
quagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)all versionsfixedredhat_csafUS
quagga-debuginfo-0:0.99.15-14.el6.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)all versionsfixedredhat_csafUS

showing 20 of 38

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2017:0794Red Hat Security Advisory: quagga security and bug fix update2017-03-21csaf · redhat_csafUS
An update for quagga is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2017-01-24modified 2026-06-17

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references (16)

External citations — patches, advisories, analysis.

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