Fixes the following security issues:
CVE-2023-4527: If the system is configured in no-aaaa mode via
/etc/resolv.conf, getaddrinfo is called for the AF_UNSPEC address
family, and a DNS response is received over TCP that is larger than
2048 bytes, getaddrinfo may potentially disclose stack contents via
the returned address data, or crash.
CVE-2023-4806: When an NSS plugin only implements the
_gethostbyname2_r and _getcanonname_r callbacks, getaddrinfo could use
memory that was freed during buffer resizing, potentially causing a
crash or read or write to arbitrary memory.
CVE-2023-5156: The fix for CVE-2023-4806 introduced a memory leak when
an application calls getaddrinfo for AF_INET6 with AI_CANONNAME,
AI_ALL and AI_V4MAPPED flags set.
CVE-2023-4911: If a tunable of the form NAME=NAME=VAL is passed in the
environment of a setuid program and NAME is valid, it may result in a
buffer overflow, which could be exploited to achieve escalated
privileges. This flaw was introduced in glibc 2.34.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
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