The default configuration for bccache.FileSystemBytecodeCache in Jinja2 before 2.7.2 does not properly create temporary files, which allows local users to gain privileges via a crafted .cache file with a name starting with _jinja2 in /tmp.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-1402
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734747
• https://bugzilla.redhat.com/show_bug.cgi?id=1051421
• https://oss.oracle.com/pipermail/el-errata/2014-June/004192.html
• http://advisories.mageia.org/MGASA-2014-0028.html
• http://jinja.pocoo.org/docs/changelog/
• http://openwall.com/lists/oss-security/2014/01/10/2
• http://openwall.com/lists/oss-security/2014/01/10/3
• http://rhn.redhat.com/errata/RHSA-2014-0747.html
• http://rhn.redhat.com/errata/RHSA-2014-0748.html
• http://www.gentoo.org/security/en/glsa/glsa-201408-13.xml
• GHSA-8r7q-cvjq-x353
• https://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2014-8.yaml
• https://web.archive.org/web/20150523060528/http://www.mandriva.com/en/support/security/advisories/advisory/MDVSA-2014:096/?name=MDVSA-2014:096