RHEL 8 : unbound (RHSA-2021:1853)

critical Nessus Plugin ID 149675
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1853 advisory.

- 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://cwe.mitre.org/data/definitions/59.html

https://cwe.mitre.org/data/definitions/190.html

https://cwe.mitre.org/data/definitions/617.html

https://cwe.mitre.org/data/definitions/787.html

https://cwe.mitre.org/data/definitions/835.html

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/errata/RHSA-2021:1853

https://bugzilla.redhat.com/1878761

https://bugzilla.redhat.com/1954772

https://bugzilla.redhat.com/1954778

https://bugzilla.redhat.com/1954780

https://bugzilla.redhat.com/1954782

https://bugzilla.redhat.com/1954794

https://bugzilla.redhat.com/1954796

https://bugzilla.redhat.com/1954797

https://bugzilla.redhat.com/1954799

https://bugzilla.redhat.com/1954801

https://bugzilla.redhat.com/1954804

Plugin Details

Severity: Critical

ID: 149675

File Name: redhat-RHSA-2021-1853.nasl

Version: 1.4

Type: local

Agent: unix

Published: 5/19/2021

Updated: 10/7/2021

Dependencies: ssh_get_info.nasl, redhat_repos.nasl

Risk Information

CVSS Score Source: CVE-2019-25042

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_aus:8.4, cpe:/o:redhat:rhel_e4s:8.4, cpe:/o:redhat:rhel_eus:8.4, cpe:/o:redhat:rhel_tus:8.4, p-cpe:/a:redhat:enterprise_linux:python3-unbound, p-cpe:/a:redhat:enterprise_linux:unbound, p-cpe:/a:redhat:enterprise_linux:unbound-devel, p-cpe:/a:redhat:enterprise_linux:unbound-libs

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 5/18/2021

Vulnerability Publication Date: 12/7/2020

Reference Information

CVE: CVE-2019-25032, CVE-2019-25034, CVE-2019-25035, CVE-2019-25036, CVE-2019-25037, CVE-2019-25038, CVE-2019-25039, CVE-2019-25040, CVE-2019-25041, CVE-2019-25042, CVE-2020-28935

RHSA: 2021:1853

CWE: 59, 190, 617, 787, 835