Vulnerability · Published Sep 15, 2023 · Assigned by GitHub_M

CVE-2023-41889Late-Unicode normalization vulnerability in SHIRASAGI

Medium 5.3

In plain English

A medium-severity security flaw in shirasagi from shirasagi. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.7%top 46.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.

Affected products (as reported)

Vendor	Product	Versions
shirasagi	shirasagi	< 1.18.0

Weakness: CWE-176 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9r x_refsource_CONFIRM
https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72 x_refsource_MISC
https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checks x_refsource_MISC