Bug 678268 (CVE-2019-8341)

Summary:	dev-python/jinja: server side injection in 'from_string' function
Product:	Gentoo Security	Reporter:	D'juan McDonald (domhnall) <flopwiki>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED INVALID
Severity:	normal	CC:	python
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/JameelNabbo/Jinja2-Code-execution
Whiteboard:	B2 [upstream]
Package list:		Runtime testing required:	---

Description D'juan McDonald (domhnall) 2019-02-18 03:58:55 UTC

(https://nvd.nist.gov/vuln/detail/CVE-2019-8341):

An issue was discovered in Jinja2 2.10. The from_string function is prone to Server Side Template Injection (SSTI) where it takes the "source" parameter as a template object, renders it, and then returns it. The attacker can exploit it with {{INJECTION COMMANDS}} in a URI.

Reference: https://www.exploit-db.com/exploits/46386

@maintainer(s): unclear if this issue was reported to upstream


Gentoo Security Padawan
(domhnall)

Comment 1 Sam James archtester

2020-03-15 15:50:57 UTC

Disputed: https://github.com/pallets/jinja/issues/549#issuecomment-187625168

>You should not execute untrusted templates in a non-sandboxed environment. That's exactly why the sandbox exists (and to be honest, even with a sandbox I would not let users provide arbitrary Jinja templates)

Comment 2 Sam James archtester

2020-06-20 01:47:58 UTC

Upstream say INVALID.