OSV-2020-2221 UNKNOWN READ in std::__1::pair<unsigned int, void*> uWS::HttpParser::fenceAndConsumePostPadded<0
An unknown read vulnerability in the uWebSockets HTTP parser can cause a crash, leading to denial of service for applications using the library.
- 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-2020-2221?
OSV-2020-2221 is a memory corruption vulnerability in uwebsockets, published on 4 Dec 2020. 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=28216
Crash type: UNKNOWN READ
Crash state:
std::__1::pair<unsigned int, void*> uWS::HttpParser::fenceAndConsumePostPadded<0
uWS::HttpParser::consumePostPadded
std::__1::__function::__func<LLVMFuzzerTestOneInput::$_0, std::__1::allocator<LL
Which versions are affected by OSV-2020-2221?
1 open source package ship an affected version, including uwebsockets.
| Package | Affected | Fixed in |
|---|---|---|
uwebsockets OSS-Fuzz | All versions | None |
How do I fix OSV-2020-2221?
No fix has been published for OSV-2020-2221 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2020-2221 being exploited?
There is no known exploitation of OSV-2020-2221 in the wild and no public exploit code.