What is CVE-2017-18264?

CVE-2017-18264 is a critical-severity vulnerability in Phpmyadmin. CVSS score: 9.8/10. Published 2018-05-01.

How severe is CVE-2017-18264?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Phpmyadmin

CVE-2017-18264

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.

EPSS: 0.030 (85.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Phpmyadmin — versions 4.7.0
Debian Debian_linux — versions 8.0
N/a — versions n/a

References

cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
cve@mitre.org (mailing-list, x_refsource_MLIST, Third Party Advisory)
cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2017-18264?: CVE-2017-18264 is a critical-severity vulnerability in Phpmyadmin. CVSS score: 9.8/10. Published 2018-05-01.
How severe is CVE-2017-18264?: Critical severity. CVSS v3 base score is 9.8 out of 10.