SB2023021442 - Multiple vulnerabilities in starlette

Description

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2023-30798)

CWE-ID: CWE-400 - Resource exhaustion

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

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

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can specify any number of form fields or files which can cause excessive memory usage resulting in denial of service of the HTTP service.

2) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

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

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in MultipartParser when processing multipart form data with too many fields or files. A remote attacker can send a specially crafted multipart request to cause a denial of service.

Exploitation requires python-multipart to be installed and the application to call request.form().

Remediation

Install update from vendor's website.

References

• https://vulncheck.com/advisories/starlette-multipartparser-dos
• https://github.com/encode/starlette/security/advisories/GHSA-74m5-2c7w-9w3x
• https://github.com/encode/starlette/commit/8c74c2c8dba7030154f8af18e016136bea1938fa
• https://github.com/Kludex/starlette/security/advisories/GHSA-74m5-2c7w-9w3x