CVE-2021-36088 Use after free in n/a
A double free vulnerability in Fluent Bit allows attackers to cause denial of service or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36088?
CVE-2021-36088 is a critical use after free vulnerability in n/a, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).
Weakness: CWE-415
Which versions are affected by CVE-2021-36088?
1 open source package ship an affected version, including fluent-bit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
fluent-bit Bitnami | From 1.7.0 | 1.7.5 |
Products include Treasuredata Fluent Bit.
How do I fix CVE-2021-36088?
Upgrade fluent-bit to 1.7.5 or later.
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 CVE-2021-36088 being exploited?
There is no known exploitation of CVE-2021-36088 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as BIT-fluent-bit-2021-36088, GHSA-89w3-2j93-4g79.