Vulnerability · Published May 26, 2023 · Assigned by GitHub_M

CVE-2023-33185Incorrect signature verification in django-ses

Medium 4.6

In plain English

A medium-severity security flaw in django-ses from django-ses. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.6Medium

Exploit odds (30 days)0.2%top 85.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Django-SES is a drop-in mail backend for Django. The django_ses library implements a mail backend for Django using AWS Simple Email Service. The library exports the `SESEventWebhookView class` intended to receive signed requests from AWS to handle email bounces, subscriptions, etc. These requests are signed by AWS and are verified by django_ses, however the verification of this signature was found to be flawed as it allowed users to specify arbitrary public certificates. This issue was patched in version 3.5.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	django-ses	3.5.0	GHSA-qg36-9jxh-fj25
PyPI	django-ses	3.5.0	PYSEC-2023-82

Affected products (as reported)

Vendor	Product	Versions
django-ses	django-ses	< 3.5.0

Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

References

https://github.com/django-ses/django-ses/security/advisories/GHSA-qg36-9jxh-fj25 x_refsource_CONFIRM
https://github.com/django-ses/django-ses/commit/b71b5f413293a13997b6e6314086cb9c22629795 x_refsource_MISC
https://github.com/django-ses/django-ses/blob/3d627067935876487f9938310d5e1fbb249a7778/CVE/001-cert-url-signature-verification.md x_refsource_MISC