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c-ares version 1.17.2
This is a security and bugfix release. It addresses a few security related
issues along with various bugfixes mostly related to portability.
Security:
o NodeJS passes NULL for addr and 0 for addrlen to ares_parse_ptr_reply() on
systems where malloc(0) returns NULL. This would cause a crash. [8]
o When building c-ares with CMake, the RANDOM_FILE would not be set and
therefore downgrade to the less secure random number generator [12]
o If ares_getaddrinfo() was terminated by an ares_destroy(), it would cause
a crash [13]
o Crash in sortaddrinfo() if the list size equals 0 due to an unexpected
DNS response [14]
o Expand number of escaped characters in DNS replies as per RFC1035 5.1 to
prevent spoofing [16], [17]
o Perform validation on hostnames to prevent possible XSS due to applications
not performing valiation themselves [18]
Changes:
o Use non-blocking /dev/urandom for random data to prevent early startup
performance issues [5]
o z/OS port [6]
o ares_malloc(0) is now defined behavior (returns NULL) rather than
system-specific to catch edge cases [7]
Bug fixes:
o Fuzz testing files were not distributed with official archives [1]
o Building tests should not force building of static libraries except on
Windows [2]
o Windows builds of the tools would fail if built as static due to a missing
CARES_STATICLIB definition [3]
o Relative headers must use double quotes to prevent pulling in a system
library [4]
o Fix OpenBSD building by implementing portability updates for including
arpa/nameser.h [9]
o Fix building out-of-tree for autotools [10]
o Make install on MacOS/iOS with CMake was missing the bundle destination so
libraries weren't actually installed [11]
o Fix retrieving DNS server configuration on MacOS and iOS if the configuration
did not include search domains [15]
o ares_parse_a_reply and ares_parse_aaa_reply were erroneously using strdup()
instead of ares_strdup() [19]
Thanks go to these friendly people for their efforts and contributions:
Anton Danielsson (@anton-danielsson)
Brad House (@bradh352)
Daniel Stenberg (@bagder)
Dhrumil Rana (@dhrumilrana)
František Dvořák (@valtri)
@halx99
Jay Freeman (@saurik)
Jean-pierre Cartal (@jeanpierrecartal)
Michael Kourlas
Philipp Jeitner
@vburdo
(11 contributors)
References to bug reports and discussions on issues:
[1] = https://github.com/c-ares/c-ares/issues/379
[2] = https://github.com/c-ares/c-ares/issues/380
[3] = https://github.com/c-ares/c-ares/issues/384
[4] = https://github.com/c-ares/c-ares/pull/386
[5] = https://github.com/c-ares/c-ares/pull/391
[6] = https://github.com/c-ares/c-ares/pull/390
[7] = https://github.com/c-ares/c-ares/commit/485fb66
[8] = https://github.com/c-ares/c-ares/issues/392
[9] = https://github.com/c-ares/c-ares/issues/388
[10] = https://github.com/c-ares/c-ares/pull/394
[11] = https://github.com/c-ares/c-ares/pull/395
[12] = https://github.com/c-ares/c-ares/pull/397
[13] = https://github.com/c-ares/c-ares/commit/df94703
[14] = https://github.com/c-ares/c-ares/pull/400
[15] = https://github.com/c-ares/c-ares/pull/401
[16] = https://github.com/c-ares/c-ares/commit/362f91d
[17] = https://github.com/c-ares/c-ares/commit/44c009b
[18] = https://github.com/c-ares/c-ares/commit/c9b6c60
[19] = https://github.com/c-ares/c-ares/pull/408
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