Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS0zNzN3LXJqODQtcHY2eM4AA0In

SafeURL-Python's hostname blocklist does not block FQDNs

Description

If a hostname was blacklisted, it was possible to bypass the blacklist by requesting the FQDN of the host (e.g. adding . to the end).

Impact

The main purpose of this library is to block requests to internal/private IPs and these cannot be bypassed using this finding. But if a library user had specifically set certain hostnames as blocked, then an attacker would be able to circumvent that block to cause SSRFs to request those hostnames.

Patches

Fixed by https://github.com/IncludeSecurity/safeurl-python/pull/6

Credit

https://github.com/Sim4n6

Permalink: https://github.com/advisories/GHSA-373w-rj84-pv6x
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS0zNzN3LXJqODQtcHY2eM4AA0In
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: 10 months ago
Updated: 10 months ago

Identifiers: GHSA-373w-rj84-pv6x
References:

• https://github.com/IncludeSecurity/safeurl-python/security/advisories/GHSA-373w-rj84-pv6x
• https://github.com/IncludeSecurity/safeurl-python/pull/6
• https://github.com/IncludeSecurity/safeurl-python/commit/c4f9677f8790a58eaa1953bac286cca75a5f580e
• https://github.com/advisories/GHSA-373w-rj84-pv6x

Repository: https://github.com/IncludeSecurity/safeurl-python
Blast Radius: 0.0

Affected Packages