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ubuntucveUbuntu.comUB:CVE-2019-9515
HistoryAug 13, 2019 - 12:00 a.m.

CVE-2019-9515

2019-08-1300:00:00
ubuntu.com
ubuntu.com
14

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.049 Low

EPSS

Percentile

92.7%

Some HTTP/2 implementations are vulnerable to a settings flood, potentially
leading to a denial of service. The attacker sends a stream of SETTINGS
frames to the peer. Since the RFC requires that the peer reply with one
acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost
equivalent in behavior to a ping. Depending on how efficiently this data is
queued, this can consume excess CPU, memory, or both.

Notes

Author Note
sbeattie nginx added http2 support in 1.9.5 nginx previously fixed issue for CVE-2018-16844 netty added http2 support in 4.1.0 twisted added http2 support in 16.3 trafficserver enabled http2 support by default in 7.0

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.049 Low

EPSS

Percentile

92.7%