Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:
- Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of
service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag.
These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each
frame disproportionate to attack bandwidth. This can consume excess CPU. (CVE-2019-9518)
- Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization
manipulation, potentially leading to a denial of service. 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. (CVE-2019-9511)
- Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. 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.
(CVE-2019-9512)
- Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service.
The attacker creates multiple request streams and continually shuffles the priority of the streams in a
way that causes substantial churn to the priority tree. This can consume excess CPU. (CVE-2019-9513)
- Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service.
The attacker opens a number of streams and sends an invalid request over each stream that should solicit a
stream of RST_STREAM frames from the peer. Depending on how the peer queues the RST_STREAM frames, this
can consume excess memory, CPU, or both. (CVE-2019-9514)
Plugin Details
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 8/9/2019