Security update for c-ares (important)

An update that fixes one vulnerability is now available.

Description:

This update for c-ares fixes the following issues:

Version update to git snapshot 1.17.1+20200724:

• CVE-2021-3672: fixed missing input validation on hostnames returned by
  DNS servers (bsc#1188881)
• If ares_getaddrinfo() was terminated by an ares_destroy(), it would
  cause 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
• Use unbuffered /dev/urandom for random data to prevent early startup
  performance issues

This update was imported from the SUSE:SLE-15:Update update project.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or “zypper patch”.

Alternatively you can run the command listed for your product:

• openSUSE Leap 15.2:

  zypper in -t patch openSUSE-2021-1168=1