CVE-2018-1283

Publication date 26 March 2018

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

Description

In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications.

Status

Package Ubuntu Release Status
apache2 18.04 LTS bionic
Fixed 2.4.29-1ubuntu4.1
17.10 artful
Fixed 2.4.27-2ubuntu4.1
16.04 LTS xenial
Fixed 2.4.18-2ubuntu3.8
14.04 LTS trusty
Fixed 2.4.7-1ubuntu4.20

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

References

Related Ubuntu Security Notices (USN)

    • USN-3627-1
    • Apache HTTP Server vulnerabilities
    • 19 April 2018
    • USN-3627-2
    • Apache HTTP Server vulnerabilities
    • 30 April 2018

Other references