CVE-2018-1312

Published: 26 March 2018

In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.

Priority

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package	Release	Status
apache2 Launchpad, Ubuntu, Debian	upstream	Released (2.4.30)
	trusty	Released (2.4.7-1ubuntu4.20)
	xenial	Released (2.4.18-2ubuntu3.8)
	artful	Released (2.4.27-2ubuntu4.1)
	bionic	Released (2.4.29-1ubuntu4.1)
	cosmic	Released (2.4.29-1ubuntu4.1)
	Patches: upstream: https://svn.apache.org/viewvc?view=revision&revision=1824481 (2.4)

Severity score breakdown

Parameter	Value
Base score	9.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Bugs

https://bz.apache.org/bugzilla/show_bug.cgi?id=54637

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