Descriptionext/standard/var_unserializer.c in PHP 5.x through 7.1.24 allows attackers to cause a denial of service (application crash) via an unserialize call for the com, dotnet, or variant class.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
php7.0 (PTS)stretch7.0.33-0+deb9u8fixed
stretch (security)7.0.33-0+deb9u12fixed
php7.3 (PTS)buster7.3.29-1~deb10u1fixed
buster (security)7.3.31-1~deb10u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
php5source(unstable)(not affected)
php7.0source(unstable)(not affected)
php7.1source(unstable)(not affected)
php7.2source(unstable)(not affected)
php7.3source(unstable)(not affected)


- php7.3 <not-affected> (Windows-specific)
- php7.2 <not-affected> (Windows-specific)
- php7.1 <not-affected> (Windows-specific)
- php7.0 <not-affected> (Windows-specific)
- php5 <not-affected> (Windows-specific)

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