critical
9.8
CWE
125 119 122
Advisory Published
CVE Published
Updated

CVE-2019-9021: Buffer Overflow

First published: Thu Dec 06 2018(Updated: )

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A heap-based buffer over-read in PHAR reading functions in the PHAR extension may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse the file name, a different vulnerability than <a href="https://access.redhat.com/security/cve/CVE-2018-20783">CVE-2018-20783</a>. This is related to phar_detect_phar_fname_ext in ext/phar/phar.c. References: <a href="https://bugs.php.net/bug.php?id=77247">https://bugs.php.net/bug.php?id=77247</a> Upstrean commit: <a href="http://git.php.net/?p=php-src.git;a=commit;h=428d8164ffcf6f75a6cc9d4056e54bfd450dac03">http://git.php.net/?p=php-src.git;a=commit;h=428d8164ffcf6f75a6cc9d4056e54bfd450dac03</a> <a href="http://git.php.net/?p=php-src.git;a=commit;h=78bd3477745f1ada9578a79f61edb41886bec1cb">http://git.php.net/?p=php-src.git;a=commit;h=78bd3477745f1ada9578a79f61edb41886bec1cb</a> <a href="http://git.php.net/?p=php-src.git;a=commit;h=9d388b95c54ea053ce6f194defe1ff6673195747">http://git.php.net/?p=php-src.git;a=commit;h=9d388b95c54ea053ce6f194defe1ff6673195747</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/rh-php71-php<0:7.1.30-1.el7
0:7.1.30-1.el7
redhat/rh-php72-php<0:7.2.24-1.el7
0:7.2.24-1.el7
redhat/php<5.6.40
5.6.40
redhat/php<7.1.26
7.1.26
redhat/php<7.2.14
7.2.14
redhat/php<7.3.1
7.3.1
debian/php5
debian/php7.0
debian/php7.3
PHP<7.1.26
7.1.26
PHP<5.6.40
PHP>=7.0.0<7.1.26
PHP>=7.2.0<7.2.14
PHP>=7.3.0<7.3.1
Debian Debian Linux=9.0
Ubuntu Linux=12.04
Ubuntu Linux=14.04
Ubuntu Linux=16.04
NetApp Storage Automation Store
openSUSE=42.3

Remedy

https://bugs.php.net/bug.php?id=77247

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-9021?

    CVE-2019-9021 is a vulnerability in PHP versions before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1 that allows an attacker to read allocated or unallocated memory through a heap-based buffer over-read in PHAR reading functions.

  • What is the severity of CVE-2019-9021?

    The severity of CVE-2019-9021 is critical with a CVSS score of 9.8.

  • How does CVE-2019-9021 impact PHP?

    CVE-2019-9021 can affect PHP versions before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1 by allowing an attacker to read memory beyond the intended data.

  • How can I fix CVE-2019-9021?

    To fix CVE-2019-9021, you should update your PHP installation to version 5.6.40, 7.1.26, 7.2.14, or 7.3.1 or later, depending on the affected version.

  • Where can I find more information about CVE-2019-9021?

    You can find more information about CVE-2019-9021 in the PHP ChangeLog and the Red Hat Security Advisory linked in the references.

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