HOMEVULNERABILITIESCVE-2017-7668
HIGH

CVE-2017-7668

CWE-126Published: June 20, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

NVD Source

Technical Analysis

CVE-2017-7668 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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Apache1 product(s)
http server
Apple1 product(s)
mac os x
Debian1 product(s)
debian linux
netapp3 product(s)
clustered data ontaponcommand unified managerstoragegrid
Oracle1 product(s)
secure global desktop
Red Hat6 product(s)
enterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux server ausenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 31 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

PATCHhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
PATCHhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
ADVISORYhttp://www.debian.org/security/2017/dsa-3896
ADVISORYhttp://www.securityfocus.com/bid/99137
ADVISORYhttp://www.securitytracker.com/id/1038711
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2479
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2483
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3193
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3194
ADVISORYhttps://security.gentoo.org/glsa/201710-32
ADVISORYhttps://security.netapp.com/advisory/ntap-20180601-0002/
ADVISORYhttps://support.apple.com/HT208221
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03821en_us
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us
ADVISORYhttps://www.tenable.com/security/tns-2019-09
ADVISORYhttp://www.debian.org/security/2017/dsa-3896
ADVISORYhttp://www.securityfocus.com/bid/99137
ADVISORYhttp://www.securitytracker.com/id/1038711
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2479
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2483
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3193
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3194
ADVISORYhttps://security.gentoo.org/glsa/201710-32
ADVISORYhttps://security.netapp.com/advisory/ntap-20180601-0002/
ADVISORYhttps://support.apple.com/HT208221
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03821en_us
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us
ADVISORYhttps://www.tenable.com/security/tns-2019-09

All References (70)

→
http://www.debian.org/security/2017/dsa-3896Third Party Advisory
→
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch · Third Party Advisory
→
http://www.securityfocus.com/bid/99137Third Party Advisory · VDB Entry
→
http://www.securitytracker.com/id/1038711Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2017:2479Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:2483Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3193Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3194Third Party Advisory
→
https://lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5af3745b%40%3Cdev.httpd.apache.org%3E
→
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/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
→
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%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/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E

Quick Facts

CVE IDCVE-2017-7668
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-126
CISA KEVNo
Affected6 vendor(s)
PublishedJun 20, 2017

Related CVEs (CWE-126)

CVE-2019-3563
9.8
CVE-2026-41898
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CVE-2018-14790
9.8
CVE-2024-49839
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CVE-2017-17772
9.8
CVE-2023-22385
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-7668 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.
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