CVE-2024-4323: fluent bit Heap-based Buffer Overflow
CVSS: 9.8v3.1CriticalAnalyzed
Published 20-05-2024Last modified 19-08-2024
Vulnerability summary
CVE-2024-4323 is a critical (CVSS 9.8) Heap-based Buffer Overflow vulnerability in fluent bit. EPSS estimates a 27.24% chance of exploitation in the next 30 days, higher than 98% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
27.24%
0%100%
High · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 0 · Related 2Timeline
- 20-05-2024PublishedVulnerability first disclosed.
- 19-08-2024Last modifiedVulnerability information updated.
Description
A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded http server’s parsing of trace requests and may result in denial of service conditions, information disclosure, or remote code execution.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
27.24%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 27.24% on 21-09-2026
21-09-202621-10-2026
EPSS score27.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (vicarius.io)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Fluent bit1 product
- fluent bit≥ 2.0.7, ≤ 3.0.3
Treasuredata1 product
- fluent_bit≥ 2.0.7, < 2.2.3 | ≥ 3.0.0, < 3.0.4
2 vendors · 2 products
References
4 links- www.vicarius.io/vsociety/posts/linguistic-lumberjack-memory-corruption-in-fluent-bit-cve-2024-4323ExploitThird Party Advisory
