nscd: Stack-based buffer overflow in netgroup cache

If the Name Service Cache Daemon's (nscd) fixed size cache is exhausted
by client requests then a subsequent client request for netgroup data
may result in a stack-based buffer overflow. This flaw was introduced
in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-33599
• https://sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-SA-2024-0005
• https://security.netapp.com/advisory/ntap-20240524-0011
• https://lists.debian.org/debian-lts-announce/2024/06/msg00026.html
• http://www.openwall.com/lists/oss-security/2024/07/22/5