OSV-2021-1174 Heap-use-after-free in zend_string_release
A heap-use-after-free vulnerability in the PHP engine's zend_string_release function allows attackers to potentially execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is OSV-2021-1174?
OSV-2021-1174 is an use after free vulnerability in php, published on 28 Aug 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=37695
Crash type: Heap-use-after-free READ 4
Crash state:
zend_string_release
zend_closure_free_storage
zend_objects_store_del
Which versions are affected by OSV-2021-1174?
1 open source package ship an affected version, including php.
| Package | Affected | Fixed in |
|---|---|---|
php OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1174?
No fix has been published for OSV-2021-1174 yet. Limit exposure of the affected software until one is available.
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 OSV-2021-1174 being exploited?
There is no known exploitation of OSV-2021-1174 in the wild and no public exploit code.