FreeBSD : nghttp2 -- multiple vulnerabilities (121fec01-c042-11e9-a73f-b36f5969f162) (Data Dribble) (Resource Loop)

high Nessus Plugin ID 127945

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

nghttp2 GitHub releases :

This release fixes CVE-2019-9511 'Data Dribble' and CVE-2019-9513 'Resource Loop' vulnerability in nghttpx and nghttpd. Specially crafted HTTP/2 frames cause Denial of Service by consuming CPU time.
Check out https://github.com/Netflix/security-bulletins/blob/master/advisories/t hird-party/2019-002.md for details. For nghttpx, additionally limiting inbound traffic by --read-rate and --read-burst options is quite effective against this kind of attack.

CVE-2019-9511 'Data Dribble': The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both, potentially leading to a denial of service.

CVE-2019-9513 'Ping Flood': The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses.
Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both, potentially leading to a denial of service.

Solution

Update the affected packages.

See Also

https://github.com/nghttp2/nghttp2/releases

http://www.nessus.org/u?5ca4073f

http://www.nessus.org/u?91c299a9

Plugin Details

Severity: High

ID: 127945

File Name: freebsd_pkg_121fec01c04211e9a73fb36f5969f162.nasl

Version: 1.3

Type: local

Published: 8/20/2019

Updated: 1/2/2020

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:libnghttp2, p-cpe:/a:freebsd:freebsd:nghttp2, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 8/16/2019

Vulnerability Publication Date: 8/13/2019

Reference Information

CVE: CVE-2019-9511, CVE-2019-9513