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ubuntucveUbuntu.comUB:CVE-2019-9516
HistoryAug 13, 2019 - 12:00 a.m.

CVE-2019-9516

2019-08-1300:00:00
ubuntu.com
ubuntu.com
26

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.007 Low

EPSS

Percentile

79.2%

Some HTTP/2 implementations are vulnerable to a header leak, potentially
leading to a denial of service. The attacker sends a stream of headers with
a 0-length header name and 0-length header value, optionally Huffman
encoded into 1-byte or greater headers. Some implementations allocate
memory for these headers and keep the allocation alive until the session
dies. This can consume excess memory.

Notes

Author Note
sbeattie nginx added http2 support in 1.9.5
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnginx< 1.14.0-0ubuntu1.4UNKNOWN
ubuntu19.04noarchnginx< 1.15.9-0ubuntu1.1UNKNOWN
ubuntu16.04noarchnginx< 1.10.3-0ubuntu0.16.04.4UNKNOWN

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.007 Low

EPSS

Percentile

79.2%