openSUSE Security Update: Security update for c-ares ______________________________________________________________________________ Announcement ID: openSUSE-SU-2021:2760-1 Rating: important References: #1188881 Cross-References: CVE-2021-3672 CVSS scores: CVE-2021-3672 (SUSE): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Affected Products: openSUSE Leap 15.3 ______________________________________________________________________________ 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 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 15.3: zypper in -t patch openSUSE-SLE-15.3-2021-2760=1 Package List: - openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64): c-ares-debugsource-1.17.1+20200724-3.14.1 c-ares-devel-1.17.1+20200724-3.14.1 c-ares-utils-1.17.1+20200724-3.14.1 c-ares-utils-debuginfo-1.17.1+20200724-3.14.1 libcares2-1.17.1+20200724-3.14.1 libcares2-debuginfo-1.17.1+20200724-3.14.1 - openSUSE Leap 15.3 (x86_64): libcares2-32bit-1.17.1+20200724-3.14.1 libcares2-32bit-debuginfo-1.17.1+20200724-3.14.1 References: https://www.suse.com/security/cve/CVE-2021-3672.html https://bugzilla.suse.com/1188881