It was found that GnuPG was vulnerable to side-channel attacks via acoustic cryptanalysis. An attacker in close range to a target system that is decrypting ciphertexts could possibly use this flaw to recover the RSA secret key from that system.
This issue affects GnuPG version 1.4. It does not affect the gnupg2 packages in Red Hat Enterprise Linux 5 and 6, and Fedora.
Red Hat would like to thank Werner Koch of GnuPG upstream for reporting this issue. Upstream acknowledges Genkin, Shamir, and Tromer as the original reporters.
This is fixed in upstream 1.4.16.
Created gnupg tracking bugs for this issue:
Affects: fedora-all [bug 1044904]
gnupg-1.4.16-2.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Via RHSA-2014:0016 https://rhn.redhat.com/errata/RHSA-2014-0016.html