CVE-2018-1283: Apache Software Foundation Apache HTTP Server…

CVE-2018-1283: In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applicat...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 19:36 UTC (UTC+00:00)

Security readout for executives and security teams

This affects Apache HTTP Server only in a specific, non-default setup: mod_session forwarding session data to CGI applications. A remote user could make a CGI application see attacker-influenced session content, potentially affecting trust decisions made by that application. Exposure is likely limited to older Apache httpd 2.4.0-2.4.29 systems using mod_session with SessionEnv on and CGI applications that consume session data. SessionEnv is not the default configuration. Treat as a targeted legacy web-server risk, not a broad emergency. Prioritize internet-facing Apache CGI deployments and systems where session data influences authentication, authorization, or business workflow decisions. Mitigation focus: Upgrade Apache HTTP Server using Apache or operating-system vendor guidance.; Confirm vendor advisories for affected distributions and appliances.; Disable SessionEnv unless CGI applications explicitly require it..

Prepared: Jun 7, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 26, 2018, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

24Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
USN-3627-1CVE reference · vendor-advisory, x_refsource_UBUNTU
DSA-4164CVE reference · vendor-advisory, x_refsource_DEBIAN
https://security.netapp.com/advisory/ntap-20180601-0004/CVE reference · x_refsource_CONFIRM
RHSA-2018:3558CVE reference · vendor-advisory, x_refsource_REDHAT
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_usCVE reference · x_refsource_CONFIRM
RHSA-2019:0367CVE reference · vendor-advisory, x_refsource_REDHAT
USN-3627-2CVE reference · vendor-advisory, x_refsource_UBUNTU
https://httpd.apache.org/security/vulnerabilities_24.htmlCVE reference · x_refsource_CONFIRM
RHSA-2019:0366CVE reference · vendor-advisory, x_refsource_REDHAT
[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20190815 svn commit: r1048742 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
https://www.tenable.com/security/tns-2019-09CVE reference · x_refsource_CONFIRM
[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073139 [11/13] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1888194 [11/13] - /httpd/site/trunk/content/security/json/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210330 svn commit: r1073149 [11/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/CVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210603 svn commit: r1075360 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST
[httpd-cvs] 20210606 svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.htmlCVE reference · mailing-list, x_refsource_MLIST

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Apache Software FoundationApache HTTP Server2.4.0 to 2.4.29Listed

Weakness

CWE details

No CWE listed

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