OSV-2021-821 Stack-buffer-overflow in jsoncons::bson::decimal128_to_chars
A stack buffer overflow in the jsoncons library allows attackers to execute arbitrary code or cause denial of service via crafted BSON input.
- 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-2021-821?
OSV-2021-821 is a memory corruption vulnerability in jsoncons, published on 2 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=34816
Crash type: Stack-buffer-overflow WRITE 6
Crash state:
jsoncons::bson::decimal128_to_chars
jsoncons::bson::basic_bson_parser<jsoncons::binary_stream_source, std::__1::allo
jsoncons::bson::basic_bson_parser<jsoncons::binary_stream_source, std::__1::allo
Which versions are affected by OSV-2021-821?
1 open source package ship an affected version, including jsoncons.
| Package | Affected | Fixed in |
|---|---|---|
jsoncons OSS-Fuzz | All versions | None |
How do I fix OSV-2021-821?
No fix has been published for OSV-2021-821 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-2021-821 being exploited?
There is no known exploitation of OSV-2021-821 in the wild and no public exploit code.