CVE-2017-7668

Publication date 19 June 2017

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

Status

Package Ubuntu Release Status
apache2 17.04 zesty
Fixed 2.4.25-3ubuntu2.1
16.10 yakkety
Fixed 2.4.18-2ubuntu4.2
16.04 LTS xenial
Fixed 2.4.18-2ubuntu3.3
14.04 LTS trusty
Fixed 2.4.7-1ubuntu4.16

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3340-1
    • Apache HTTP Server vulnerabilities
    • 26 June 2017
    • USN-3373-1
    • Apache HTTP Server vulnerabilities
    • 31 July 2017

Other references