PT-2021-21109 · Unknown · Fluent-Bit

David Korczynski · Published 2021-07-01 · Updated 2024-07-03 · CVE-2021-36088

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Fluent Bit (aka fluent-bit) versions 1.7.0 through 1.7.4

Description: The issue is related to a double free in the flb free function, which is called from flb parser json do and flb parser do.

Recommendations: For Fluent Bit (aka fluent-bit) versions 1.7.0 through 1.7.4, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BIT-FLUENT-BIT-2021-36088

CVE-2021-36088

Affected Products

Fluent-Bit

References · 7

• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33750 · Exploit
• https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54 · Patch
• https://github.com/fluent/fluent-bit/pull/3453 · Patch
• https://osv.dev/vulnerability/CVE-2021-36088 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36088 · Security Note
• https://osv.dev/vulnerability/BIT-fluent-bit-2021-36088 · Vendor Advisory
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/fluent-bit/OSV-2021-702.yaml · Note