DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
php7.3 (PTS)buster7.3.31-1~deb10u1fixed
buster (security)7.3.31-1~deb10u6fixed
php7.4 (PTS)bullseye7.4.33-1+deb11u4fixed
bullseye (security)7.4.33-1+deb11u5fixed
php8.2 (PTS)bookworm8.2.7-1~deb12u1fixed
bookworm (security)8.2.18-1~deb12u1fixed
sid, trixie8.2.18-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
php7.3source(unstable)(not affected)
php7.4source(unstable)(not affected)
php8.2source(unstable)(not affected)


- php8.2 <not-affected> (Only affects 8.3)
- php7.4 <not-affected> (Only affects 8.3)
- php7.3 <not-affected> (Only affects 8.3)
Fixed in: 8.3.6

Search for package or bug name: Reporting problems