PT-2019-10199 · Yii · Yii

Chenjj · Published 2019-01-28 · Updated 2022-05-14 · CVE-2018-20745

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions: Yii versions 2.x through 2.0.15.1

Description: The issue arises from the active conversion of a wildcard CORS policy into reflecting an arbitrary Origin header value. This behavior is incompatible with the CORS security design and could lead to CORS misconfiguration security problems.

Recommendations: For versions 2.x through 2.0.15.1, consider disabling the automatic conversion of wildcard CORS policies to prevent reflecting arbitrary Origin header values until a patch is available. Restrict access to sensitive resources to minimize the risk of exploitation.

Fix

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2018-20745

GHSA-CR6R-6XM9-WW22

Affected Products

Yii

References · 7

• https://osv.dev/vulnerability/CVE-2018-20745 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20745 · Security Note
• https://osv.dev/vulnerability/GHSA-cr6r-6xm9-ww22 · Vendor Advisory
• https://github.com/yiisoft/yii2/pull/16198 · Note
• https://github.com/yiisoft/yii2/issues/16193 · Note
• https://usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20745 · Note