OSV-2022-254 Heap-use-after-free in jsmn_parse
A heap-use-after-free vulnerability in the jsmn JSON parser allows attackers to cause denial of service or potentially execute code via crafted 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-2022-254?
OSV-2022-254 is an use after free vulnerability in fluent-bit, published on 19 Mar 2022. 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=45651
Crash type: Heap-use-after-free WRITE 4
Crash state:
jsmn_parse
flb_json_tokenise
flb_pack_json_state
Which versions are affected by OSV-2022-254?
1 open source package ship an affected version, including fluent-bit.
| Package | Affected | Fixed in |
|---|---|---|
fluent-bit OSS-Fuzz | All versions | None |
How do I fix OSV-2022-254?
No fix has been published for OSV-2022-254 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-2022-254 being exploited?
There is no known exploitation of OSV-2022-254 in the wild and no public exploit code.