CVE-2018-1283

Http Server vulnerability

CVSS

5.3

EPSS

10.1%

EPSS pct

95th

Exploited

No known

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.

Affected vendor

Apache

Affected product

Http Server

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Published

2018-03-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 10.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2018-1283

Confirm whether Apache Http Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-1283.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-1283

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-1283 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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