Stack-based buffer overflow in fastapi

1) Stack-based buffer overflow

EUVDB-ID: #VU61917

Risk: Medium

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-45958

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in Buffer_AppendIndentUnchecked. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause a denial of service condition on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FastAPI: 0.75.0 - 0.75.1

CPE2.3

• cpe:2.3:a:fastapi_project:fastapi:0.75.0:*:*:*:*:*:*:*
• cpe:2.3:a:fastapi_project:fastapi:0.75.1:*:*:*:*:*:*:*

External links

http://github.com/tiangolo/fastapi/releases/tag/0.75.2

Q & A

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.