PHP mb_encode_mimeheader runs endlessly for some inputs
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.9%
exploitation probability
1.9%top 22% of all CVEs
observed exploitation
nono source reports it
In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
PHP Group · PHPReferences
https://github.com/php/php-src/security/advisories/GHSA-fjp9-9hwx-59fqhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJZK3X6B7FBE32FETDSMRLJXTFTHKWSY/https://security.netapp.com/advisory/ntap-20240510-0011/http://www.openwall.com/lists/oss-security/2024/04/12/11