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CVE-2019-10081

Published: 15 August 2019

HTTP/2 (2.4.20 through 2.4.39) very early pushes, for example configured with "H2PushResource", could lead to an overwrite of memory in the pushing request's pool, leading to crashes. The memory copied is that of the configured push link header values, not data supplied by the client.

Notes

AuthorNote
sbeattie
apache 2.4.20 and newer
apache 2.4.18 does not build mod_http2.

Mitigation

Unpatched servers can disable HTTP/2 push with the "H2Push off" directive.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
bionic
Released (2.4.29-1ubuntu4.10)
disco
Released (2.4.38-2ubuntu2.2)
trusty Not vulnerable
(code not present)
upstream
Released (2.4.41-1)
xenial Not vulnerable
(code not built)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H