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Medium DSA-4856-1 5 CVEs

php7.3 - security update

Published Feb 17, 2021 · Updated Mar 9, 2026

Fixed packages 1

ReleasePackageFixed in
Debian · 10 php7.3 7.3.27-1~deb10u1

Vulnerabilities 5

  • Medium 5.4

    Wrong ciphertext/tag in AES-CCM encryption for a 12 bytes IV

    In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when AES-CCM mode is used with openssl_encrypt() function with 12 bytes IV, only first 7 bytes of the IV is actually used. This can lead to both decreased security and incorrect en…

  • Medium 5.3

    FILTER_VALIDATE_URL accepts URLs with invalid userinfo

    In PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14 and 8.0.0, when validating URL with functions like filter_var($url, FILTER_VALIDATE_URL), PHP will accept an URL with invalid password as valid URL. This may lead to functions that rely on URL being valid…

  • Medium 5.3

    Null Dereference in SoapClient

    In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus c…

  • Medium 4.8

    Use of freed hash key in the phar_parse_zipfile function

    In PHP versions 7.2.x below 7.2.33, 7.3.x below 7.3.21 and 7.4.x below 7.4.9, while processing PHAR files using phar extension, phar_parse_zipfile could be tricked into accessing freed memory, which could lead to a crash or information disclosure.

  • Medium 4.3

    PHP parses encoded cookie names so malicious `__Host-` cookies can be sent

    In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such p…