openSUSE-SU-2021:1168-1: important: Security update for c-ares
openSUSE Security Update: Security update for c-ares
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Announcement ID: openSUSE-SU-2021:1168-1
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 15.2
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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
Package List:
- openSUSE Leap 15.2 (i586 x86_64):
c-ares-debugsource-1.17.1+20200724-lp152.2.9.1
c-ares-devel-1.17.1+20200724-lp152.2.9.1
c-ares-utils-1.17.1+20200724-lp152.2.9.1
c-ares-utils-debuginfo-1.17.1+20200724-lp152.2.9.1
libcares2-1.17.1+20200724-lp152.2.9.1
libcares2-debuginfo-1.17.1+20200724-lp152.2.9.1
- openSUSE Leap 15.2 (x86_64):
libcares2-32bit-1.17.1+20200724-lp152.2.9.1
libcares2-32bit-debuginfo-1.17.1+20200724-lp152.2.9.1
References:
https://www.suse.com/security/cve/CVE-2021-3672.html
https://bugzilla.suse.com/1188881
A c-ares security update has been released for openSUSE Leap 15.2.
