HOMEVULNERABILITIESCVE-2018-1303
HIGH

CVE-2018-1303

CWE-125Published: March 26, 2018· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

A specially crafted HTTP request header could have crashed the Apache HTTP Server prior to version 2.4.30 due to an out of bound read while preparing data to be cached in shared memory. It could be used as a Denial of Service attack against users of mod_cache_socache. The vulnerability is considered as low risk since mod_cache_socache is not widely used, mod_cache_disk is not concerned by this vulnerability.

NVD Source

Technical Analysis

CVE-2018-1303 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Apache1 product(s)
http server
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
netapp4 product(s)
santricity cloud connectorstorage automation storestoragegridclustered data ontap
Source: NVD CPE · 11 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.openwall.com/lists/oss-security/2018/03/24/3
ADVISORYhttp://www.securityfocus.com/bid/103522
ADVISORYhttp://www.securitytracker.com/id/1040572
ADVISORYhttps://access.redhat.com/errata/RHSA-2018:3558
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0366
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0367
ADVISORYhttps://httpd.apache.org/security/vulnerabilities_24.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20180601-0004/
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us
ADVISORYhttps://usn.ubuntu.com/3627-1/
ADVISORYhttps://usn.ubuntu.com/3627-2/
ADVISORYhttps://www.debian.org/security/2018/dsa-4164
ADVISORYhttp://www.openwall.com/lists/oss-security/2018/03/24/3
ADVISORYhttp://www.securityfocus.com/bid/103522
ADVISORYhttp://www.securitytracker.com/id/1040572
ADVISORYhttps://access.redhat.com/errata/RHSA-2018:3558
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0366
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0367
ADVISORYhttps://httpd.apache.org/security/vulnerabilities_24.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20180601-0004/
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us
ADVISORYhttps://usn.ubuntu.com/3627-1/
ADVISORYhttps://usn.ubuntu.com/3627-2/
ADVISORYhttps://www.debian.org/security/2018/dsa-4164

All References (50)

→
http://www.openwall.com/lists/oss-security/2018/03/24/3Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/103522Third Party Advisory · VDB Entry
→
http://www.securitytracker.com/id/1040572Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0366Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:0367Third Party Advisory
→
https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
→
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E

Quick Facts

CVE IDCVE-2018-1303
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
Affected4 vendor(s)
PublishedMar 26, 2018

Related CVEs (CWE-125)

CVE-2021-21777
10.0
CVE-2017-14451
10.0
CVE-2009-2523
10.0
CVE-2013-0767
10.0
CVE-2021-41556
10.0
CVE-2023-26489
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-1303 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2018-1303·NVD