Gentoo Linux Security Advisory 201110-23 - An input sanitation flaw in mod_authnz_external allows remote attacker to conduct SQL injection. Versions prior to 3.2.6 are affected.
199e8bf204b111a8bf85a0a7eabb27f27de06cfc4f46386df48331400a29dd26
Debian Linux Security Advisory 2279-1 - It was discovered that libapache2-mod-authnz-external, an apache authentication module, is prone to an SQL injection via the $user parameter.
ec45376c90269e2171f83907227c70bac429c3bfb224ee3eb33a2ff3eb47e6c1