Vulnerability identifier: #VU49223
Vulnerability risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-787
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Fluent Bit
Server applications /
Other server solutions
Vendor: fluentbit.io
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input within the flb_gzip_compress() function in flb_gzip.c. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Fluent Bit: 1.6.0 - 1.6.3
External links
http://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261
http://fluentbit.io/announcements/v1.6.4/
http://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.