SB2022072567 - Information disclosure in scrapy

Description

This security bulletin contains information about 1 vulnerability.

1) Information disclosure (CVE-ID: N/A)

The vulnerability allows a remote attacker to disclose proxy credentials to a different proxy.

The vulnerability exists due to improper handling of authentication headers in the built-in HTTP proxy downloader middleware when processing requests whose proxy metadata is changed during retries or redirects. A remote attacker can use a proxy-rotation setup that changes proxy metadata without clearing the previous authentication header to disclose proxy credentials to a different proxy.

The issue affects environments that rotate proxies from different proxy providers and where at least one proxy requires credentials.

Remediation

Install update from vendor's website.

References

• https://github.com/scrapy/scrapy/security/advisories/GHSA-9x8m-2xpf-crp3
• https://github.com/advisories/GHSA-9x8m-2xpf-crp3