OSV-2021-841 Heap-use-after-free in AK::StringImpl::create
A heap-use-after-free in AK::StringImpl::create allows attackers to execute arbitrary code or cause denial of service via crafted data URLs.
- 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-2021-841?
OSV-2021-841 is an use after free vulnerability in serenity, published on 7 Jun 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=34973
Crash type: Heap-use-after-free READ {*}
Crash state:
AK::StringImpl::create
AK::String::String
AK::URLParser::parse_data_url
Which versions are affected by OSV-2021-841?
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-2021-841?
No fix has been published for OSV-2021-841 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-2021-841 being exploited?
There is no known exploitation of OSV-2021-841 in the wild and no public exploit code.