RedHat: RHSA-2021-1853:01 Moderate: unbound security, bug fix,
Summary
The unbound packages provide a validating, recursive, and caching DNS or
DNSSEC resolver.
Security Fix(es):
* unbound: integer overflow in the regional allocator via regional_alloc
(CVE-2019-25032)
* unbound: integer overflow in sldns_str2wire_dname_buf_origin can lead to
an out-of-bounds write (CVE-2019-25034)
* unbound: out-of-bounds write in sldns_bget_token_par (CVE-2019-25035)
* unbound: assertion failure and denial of service in synth_cname
(CVE-2019-25036)
* unbound: assertion failure and denial of service in dname_pkt_copy via an
invalid packet (CVE-2019-25037)
* unbound: integer overflow in a size calculation in dnscrypt/dnscrypt.c
(CVE-2019-25038)
* unbound: integer overflow in a size calculation in respip/respip.c
(CVE-2019-25039)
* unbound: infinite loop via a compressed name in dname_pkt_copy
(CVE-2019-25040)
* unbound: assertion failure via a compressed name in dname_pkt_copy
(CVE-2019-25041)
* unbound: out-of-bounds write via a compressed name in rdata_copy
(CVE-2019-25042)
* unbound: symbolic link traversal when writing PID file (CVE-2020-28935)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release Notes linked from the References section.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2019-25032 https://access.redhat.com/security/cve/CVE-2019-25034 https://access.redhat.com/security/cve/CVE-2019-25035 https://access.redhat.com/security/cve/CVE-2019-25036 https://access.redhat.com/security/cve/CVE-2019-25037 https://access.redhat.com/security/cve/CVE-2019-25038 https://access.redhat.com/security/cve/CVE-2019-25039 https://access.redhat.com/security/cve/CVE-2019-25040 https://access.redhat.com/security/cve/CVE-2019-25041 https://access.redhat.com/security/cve/CVE-2019-25042 https://access.redhat.com/security/cve/CVE-2020-28935 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/
Package List
Red Hat Enterprise Linux AppStream (v. 8):
Source:
unbound-1.7.3-15.el8.src.rpm
aarch64:
python3-unbound-1.7.3-15.el8.aarch64.rpm
python3-unbound-debuginfo-1.7.3-15.el8.aarch64.rpm
unbound-1.7.3-15.el8.aarch64.rpm
unbound-debuginfo-1.7.3-15.el8.aarch64.rpm
unbound-debugsource-1.7.3-15.el8.aarch64.rpm
unbound-devel-1.7.3-15.el8.aarch64.rpm
unbound-libs-1.7.3-15.el8.aarch64.rpm
unbound-libs-debuginfo-1.7.3-15.el8.aarch64.rpm
ppc64le:
python3-unbound-1.7.3-15.el8.ppc64le.rpm
python3-unbound-debuginfo-1.7.3-15.el8.ppc64le.rpm
unbound-1.7.3-15.el8.ppc64le.rpm
unbound-debuginfo-1.7.3-15.el8.ppc64le.rpm
unbound-debugsource-1.7.3-15.el8.ppc64le.rpm
unbound-devel-1.7.3-15.el8.ppc64le.rpm
unbound-libs-1.7.3-15.el8.ppc64le.rpm
unbound-libs-debuginfo-1.7.3-15.el8.ppc64le.rpm
s390x:
python3-unbound-1.7.3-15.el8.s390x.rpm
python3-unbound-debuginfo-1.7.3-15.el8.s390x.rpm
unbound-1.7.3-15.el8.s390x.rpm
unbound-debuginfo-1.7.3-15.el8.s390x.rpm
unbound-debugsource-1.7.3-15.el8.s390x.rpm
unbound-devel-1.7.3-15.el8.s390x.rpm
unbound-libs-1.7.3-15.el8.s390x.rpm
unbound-libs-debuginfo-1.7.3-15.el8.s390x.rpm
x86_64:
python3-unbound-1.7.3-15.el8.x86_64.rpm
python3-unbound-debuginfo-1.7.3-15.el8.i686.rpm
python3-unbound-debuginfo-1.7.3-15.el8.x86_64.rpm
unbound-1.7.3-15.el8.x86_64.rpm
unbound-debuginfo-1.7.3-15.el8.i686.rpm
unbound-debuginfo-1.7.3-15.el8.x86_64.rpm
unbound-debugsource-1.7.3-15.el8.i686.rpm
unbound-debugsource-1.7.3-15.el8.x86_64.rpm
unbound-devel-1.7.3-15.el8.i686.rpm
unbound-devel-1.7.3-15.el8.x86_64.rpm
unbound-libs-1.7.3-15.el8.i686.rpm
unbound-libs-1.7.3-15.el8.x86_64.rpm
unbound-libs-debuginfo-1.7.3-15.el8.i686.rpm
unbound-libs-debuginfo-1.7.3-15.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for unbound is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64
Bugs Fixed
1714175 - Fix SPEC file to not check md5 mtime and size of /var/lib/unbound/root.key
1842837 - rpmlint reports crypto-policy-non-compliance-openssl
1850460 - Enable additional logging in unbound in RHEL8
1878761 - CVE-2020-28935 unbound: symbolic link traversal when writing PID file
1954772 - CVE-2019-25032 unbound: integer overflow in the regional allocator via regional_alloc
1954778 - CVE-2019-25034 unbound: integer overflow in sldns_str2wire_dname_buf_origin can lead to an out-of-bounds write
1954780 - CVE-2019-25035 unbound: out-of-bounds write in sldns_bget_token_par
1954782 - CVE-2019-25036 unbound: assertion failure and denial of service in synth_cname
1954794 - CVE-2019-25037 unbound: assertion failure and denial of service in dname_pkt_copy via an invalid packet
1954796 - CVE-2019-25038 unbound: integer overflow in a size calculation in dnscrypt/dnscrypt.c
1954797 - CVE-2019-25039 unbound: integer overflow in a size calculation in respip/respip.c
1954799 - CVE-2019-25040 unbound: infinite loop via a compressed name in dname_pkt_copy
1954801 - CVE-2019-25041 unbound: assertion failure via a compressed name in dname_pkt_copy
1954804 - CVE-2019-25042 unbound: out-of-bounds write via a compressed name in rdata_copy
