Arbitrary Code Injection Affecting jinja2 package, versions *


Severity

Recommended
low

Based on Debian security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    3.49% (92nd percentile)

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  • Snyk ID SNYK-DEBIANUNSTABLE-JINJA2-337443
  • published 15 Feb 2019
  • disclosed 15 Feb 2019

How to fix?

There is no fixed version for Debian:unstable jinja2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jinja2 package and not the jinja2 package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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. NOTE: The maintainer and multiple third parties believe that this vulnerability isn't valid because users shouldn't use untrusted templates without sandboxing

CVSS Scores

version 3.1
Expand this section

NVD

9.8 critical
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High