CVE-2014-0012 — FileSystemBytecodeCache in Jinja2 2

FileSystemBytecodeCache in Jinja2 2.7.2 does not properly create temporary directories, which allows local users to gain privileges by pre-creating a temporary directory with a user's uid. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-1402.

01What is this vulnerability?

FileSystemBytecodeCache in Jinja2 2.7.2 does not properly create temporary directories, which allows local users to gain privileges by pre-creating a temporary directory with a user's uid. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-1402.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

08Timeline

• Published: 2014-05-19T14:00:00.000Z
• Last modified: 2024-08-06T08:58:26.479Z

09References

• github.com — https://github.com/mitsuhiko/jinja2/pull/292
• secunia.com — http://secunia.com/advisories/56328
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1051421
• secunia.com — http://secunia.com/advisories/60738
• github.com — https://github.com/mitsuhiko/jinja2/commit/acb672b6a179567632e032f547582f30fa2f4…
• github.com — https://github.com/mitsuhiko/jinja2/pull/296
• www.gentoo.org — http://www.gentoo.org/security/en/glsa/glsa-201408-13.xml
• seclists.org — http://seclists.org/oss-sec/2014/q1/73