CVE-2018-1283: apache software foundation apache http server
Vulnerability summary
CVE-2018-1283 is a medium (CVSS 5.3) vulnerability in apache software foundation apache http server. EPSS estimates a 9.74% chance of exploitation in the next 30 days, higher than 95.5% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 6Timeline
- 26-03-2018PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
9.74%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
No change 0.00 pp
From 9.74% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Netapp4 products
Debian2 products
- apache2< 2.4.33-1
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- apache2< 2.4.33-r0
Apache1 product
- http_server≥ 2.4.0, ≤ 2.4.29
Apache software foundation1 product
- apache http server2.4.0 to 2.4.29
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10 | 18.04
Redhat1 product
- enterprise_linuxEOL6.0 | 7.0 | 7.4 | 7.5 | 7.6
Ubuntu1 product
- apache2< 2.4.7-1ubuntu4.20 | < 2.4.18-2ubuntu3.8 | < 2.4.29-1ubuntu4.1
8 vendors · 12 products
References
32 links
- support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_usX Refsource CONFIRMThird Party Advisory
- www.openwall.com/lists/oss-security/2018/03/24/4Mailing ListX Refsource MLISTThird Party AdvisoryREPORT
Show all 32 references
- www.tenable.com/security/tns-2019-09X Refsource CONFIRM