OSV-2021-804 Heap-use-after-free in AK::NonnullOwnPtr<JS::IndexedPropertyStorage>::operator->
A heap-use-after-free vulnerability in the SerenityOS JavaScript engine allows attackers to cause a crash or potentially execute arbitrary code via crafted scripts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-804?
OSV-2021-804 is an use after free vulnerability in serenity, published on 27 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34688
Crash type: Heap-use-after-free READ 8
Crash state:
AK::NonnullOwnPtr<JS::IndexedPropertyStorage>::operator->
JS::IndexedProperties::array_like_size
JS::IndexedProperties::append
Which versions are affected by OSV-2021-804?
1 open source package ship an affected version, including serenity.
| Package | Affected | Fixed in |
|---|---|---|
serenity OSS-Fuzz | All versions | None |
How do I fix OSV-2021-804?
No fix has been published for OSV-2021-804 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-2021-804 being exploited?
There is no known exploitation of OSV-2021-804 in the wild and no public exploit code.