- update to 1.17.2:
Security:
* When building c-ares with CMake, the RANDOM_FILE would not be set
and therefore downgrade to the less secure random number generator
* If ares_getaddrinfo() was terminated by an ares_destroy(),
it would cause a crash
* Crash in sortaddrinfo() if the list size equals 0 due to
an unexpected DNS response
* Expand number of escaped characters in DNS replies as per
RFC1035 5.1 to prevent spoofing follow-up
(bsc#1188881, CVE-2021-3672)
* Perform validation on hostnames to prevent possible XSS
due to applications not performing valiation themselves
Changes:
* ares_malloc(0) is now defined behavior (returns NULL) rather than system-specific to catch edge cases
Bug fixes:
* Building tests should not force building of static libraries except on Windows
* Relative headers must use double quotes to prevent pulling in a system library
for details see,
https://c-ares.haxx.se/changelog.html#1_17_2