nis/nss_nis/nis-pwd.c in the GNU C Library (aka glibc or libc6) 2.7 and Embedded GLIBC (EGLIBC) 2.10.2 adds information from the passwd.adjunct.byname map to entries in the passwd map, which allows remote attackers to obtain the encrypted passwords of NIS accounts by calling the getpwnam function.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560333
http://marc.info/?l=oss-security&m=126320356003425&w=2
http://marc.info/?l=oss-security&m=126320570505651&w=2
https://lists.opensuse.org/opensuse-security-announce/2010-10/msg00007.html
http://sourceware.org/bugzilla/show_bug.cgi?id=11134
http://www.mandriva.com/security/advisories?name=MDVSA-2010:111
http://www.mandriva.com/security/advisories?name=MDVSA-2010:112
http://www.openwall.com/lists/oss-security/2010/01/07/3
http://www.openwall.com/lists/oss-security/2010/01/08/1