OSV-2021-563 Heap-use-after-free in AK::NonnullOwnPtr<JS::IndexedPropertyStorage>::operator->
A heap-use-after-free vulnerability in the SerenityOS browser's JavaScript engine allows attackers to execute arbitrary code or cause a denial of service via crafted web content.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2021-563?
OSV-2021-563 is an use after free vulnerability in serenity, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32459
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-2021-563?
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-2021-563?
No fix has been published for OSV-2021-563 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-2021-563 being exploited?
There is no known exploitation of OSV-2021-563 in the wild and no public exploit code.