CVE-2017-12934 Use after free in n/a
A heap use-after-free vulnerability in PHP's unserializer allows attackers to potentially execute arbitrary code or cause denial of service via untrusted data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12934?
CVE-2017-12934 is a high-severity use after free vulnerability in Php Php, published on 18 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
Weakness: CWE-416
Which versions are affected by CVE-2017-12934?
It affects 1 product.
Products include Php Php.
How do I fix CVE-2017-12934?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2017-12934 being exploited?
There is no known exploitation of CVE-2017-12934 in the wild and no public exploit code.
Other vulnerabilities in Php Php
Sources
Also known as GHSA-cmv9-8x32-p5q7.