Alpine: multiple bind packages: security update to 9.16.15-r0

critical Tenable Cloud Security Plugin ID 423710

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and
9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11
of the BIND 9.17 development branch, when a vulnerable version of named receives a malformed IXFR
triggering the flaw described above, the named process will terminate due to a failed assertion the next
time the transferred secondary zone is refreshed. (CVE-2021-25214)

- In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 ->
9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND
9.17 development branch, when a vulnerable version of named receives a query for a record triggering the
flaw described above, the named process will terminate due to a failed assertion check. The vulnerability
affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other
versions of BIND 9. (CVE-2021-25215)

- In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.11.3-S1 -> 9.11.29-S1 and 9.16.8-S1 ->
9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.1 of the BIND
9.17 development branch, BIND servers are vulnerable if they are running an affected version and are
configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable
code path is not exposed, but a server can be rendered vulnerable by explicitly setting values for the
tkey-gssapi-keytab or tkey-gssapi-credential configuration options. Although the default configuration is
not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in
mixed-server environments that combine BIND servers with Active Directory domain controllers. For servers
that meet these conditions, the ISC SPNEGO implementation is vulnerable to various attacks, depending on
the CPU architecture for which BIND was built: For named binaries compiled for 64-bit platforms, this flaw
can be used to trigger a buffer over-read, leading to a server crash. For named binaries compiled for
32-bit platforms, this flaw can be used to trigger a server crash due to a buffer overflow and possibly
also to achieve remote code execution. We have determined that standard SPNEGO implementations are
available in the MIT and Heimdal Kerberos libraries, which support a broad range of operating systems,
rendering the ISC implementation unnecessary and obsolete. Therefore, to reduce the attack surface for
BIND users, we will be removing the ISC SPNEGO implementation in the April releases of BIND 9.11 and 9.16
(it had already been dropped from BIND 9.17). We would not normally remove something from a stable ESV
(Extended Support Version) of BIND, but since system libraries can replace the ISC SPNEGO implementation,
we have made an exception in this case for reasons of stability and security. (CVE-2021-25216)

Plugin Details

Severity: Critical

ID: 423710

Version: Revision 1.7

Type: Local

Family: Alpine Linux Local Security Checks

Published: 4/4/2025

Updated: 5/30/2025

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 97.35

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-25216

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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/28/2021

Reference Information

CVE: CVE-2021-25214, CVE-2021-25215, CVE-2021-25216

IAVA: 2021-A-0206-S

Detections

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