CVE-2019-13224, Other Critical Flaws in PHP - patch nu
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CVE-2019-13224, Other Critical Flaws in PHP – patch nu

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The latest versions of PHP were recently released (PHP version 7.3.9, 7.2.22 og 7.1.32 across several branches) to address several highly critical vulnerabilities in its core and bundled libraries. The most dangerous of these vulnerabilities are the ones that could lead to remote code execution.

Næsten 80% af alle hjemmesider kører på PHP. Mere specielt, "PHP bruges af 78.9% af alle de hjemmesider, hvis server-side programmeringssprog vi kender", according to W3Techs statistics. This means that the vulnerabilities could affect a large number of web applications that utilize PHP, including websites that run on content management systems such as WordPress and Drupal, forskere advarer.




Mere specifikt, depending on the affected codebase in a PHP app, the worst-case scenario attacks based on these flaws could allow threat actors to execute arbitrary code in the context of the application. In case of a failed attempt of exploitation, a denial-of-service (DoS) condition could be triggered on affected systems.

Relaterede: CVE-2019-6977: Endnu en WordPress Kritisk Fejl fundet, Venstre Unpatched For 6 år

More about CVE-2019-13224

The worst of the flaws is known under the CVE-2019-13224 advisory. According to the official CVE-2019-13224 description, the vulnerability is “a use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2” that could allow attackers to potentially cause information disclosure, Servicenægtelse, or possibly code execution by providing a crafted regular expression.

The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust, the advisory reads.

The already available patches address vulnerabilities in cURL, Exif function, FastCGI Process Manager, OPcache. There is currently no information of active attacks against these flaws. Men, immediate patching is required, so consider updating to the latest PHP version version 7.3.9, 7.2.22, eller 7.1.32 så hurtigt som muligt. It should be noted that PHP version 7.1.32 fixes the CVE-2019-13224 flaw.

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Milena Dimitrova

En inspireret forfatter og indhold leder, der har været med SensorsTechForum for 4 år. Nyder ’Mr. Robot’og frygt’1984’. Fokuseret på brugernes privatliv og malware udvikling, hun tror stærkt på en verden, hvor cybersikkerhed spiller en central rolle. Hvis almindelig sund fornuft giver ingen mening, hun vil være der til at tage noter. Disse noter senere kan blive til artikler!

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