nscd: netgroup cache may terminate daemon on memory allocation failure

The Name Service Cache Daemon's (nscd) netgroup cache uses xmalloc or
xrealloc and these functions may terminate the process due to a memory
allocation failure resulting in a denial of service to the clients. The
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-2024-33601
• https://sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-SA-2024-0007
• https://security.netapp.com/advisory/ntap-20240524-0014
• https://lists.debian.org/debian-lts-announce/2024/06/msg00026.html