HOMEVULNERABILITIESCVE-2017-18264
CRITICAL

CVE-2017-18264

NVD-CWE-noinfoPublished: May 1, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

NVD Source

Technical Analysis

CVE-2017-18264 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

Debian1 product(s)
debian linux
phpmyadmin1 product(s)
phpmyadmin
Source: NVD CPE · 3 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

PATCHhttps://www.phpmyadmin.net/security/PMASA-2017-8/
PATCHhttps://www.phpmyadmin.net/security/PMASA-2017-8/
ADVISORYhttp://www.securityfocus.com/bid/97211
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/07/msg00006.html
ADVISORYhttp://www.securityfocus.com/bid/97211
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/07/msg00006.html

All References (6)

→
http://www.securityfocus.com/bid/97211Third Party Advisory · VDB Entry
→
https://lists.debian.org/debian-lts-announce/2018/07/msg00006.htmlThird Party Advisory
→
https://www.phpmyadmin.net/security/PMASA-2017-8/Patch · Vendor Advisory
→
http://www.securityfocus.com/bid/97211Third Party Advisory · VDB Entry
→
https://lists.debian.org/debian-lts-announce/2018/07/msg00006.htmlThird Party Advisory
→
https://www.phpmyadmin.net/security/PMASA-2017-8/Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2017-18264
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedMay 1, 2018

Related CVEs (NVD-CWE-noinfo)

CVE-2019-11210
10.0
CVE-2019-1372
10.0
CVE-2018-18748
10.0
CVE-2019-9548
10.0
CVE-2019-16650
10.0
CVE-2020-1953
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-18264 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.COM. CVE data is provided under the NVD usage policy.
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