The shell_quote function in python-gnupg 0.3.5 does not properly quote strings, which allows context-dependent attackers to execute arbitrary code via shell metacharacters in unspecified vectors, as demonstrated using “$(” command-substitution sequences, a different vulnerability than CVE-2014-1928. NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-7323.
seclists.org/oss-sec/2014/q1/245
seclists.org/oss-sec/2014/q1/294
secunia.com/advisories/56616
secunia.com/advisories/59031
www.debian.org/security/2014/dsa-2946
bitbucket.org/vinay.sajip/python-gnupg
code.google.com/p/python-gnupg
code.google.com/p/python-gnupg/issues/detail?id=98
github.com/advisories/GHSA-r3vr-prwv-86g9
nvd.nist.gov/vuln/detail/CVE-2014-1927