CVE-2021-25216
" BIND GSS-TSIG SPNEGO Buffer Over-Read/Overflow Vulnerability"
Description
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.
INFO
Published Date :
April 29, 2021, 1:15 a.m.
Last Modified :
May 3, 2022, 4:04 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-25216 has a 9 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
Affected Products
The following products are affected by CVE-2021-25216
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-25216
.
URL | Resource |
---|---|
http://www.openwall.com/lists/oss-security/2021/04/29/1 | Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2021/04/29/2 | Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2021/04/29/3 | Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2021/04/29/4 | Mailing List Third Party Advisory |
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf | Patch Third Party Advisory |
https://kb.isc.org/v1/docs/cve-2021-25215 | Not Applicable |
https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html | Mailing List Third Party Advisory |
https://security.netapp.com/advisory/ntap-20210521-0006/ | Third Party Advisory |
https://www.debian.org/security/2021/dsa-4909 | Third Party Advisory |
https://www.zerodayinitiative.com/advisories/ZDI-21-657/ | Third Party Advisory VDB Entry |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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Emacs Lisp Makefile C Shell Roff HTML C++ XSLT Perl Python
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Уязвимости и атаки на информационные системы
None
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Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-25216
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-25216
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
May. 03, 2022
Action Type Old Value New Value Changed CWE CWE-190 CWE-125 -
Modified Analysis by [email protected]
Apr. 25, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20210521-0006/ No Types Assigned https://security.netapp.com/advisory/ntap-20210521-0006/ Third Party Advisory Changed Reference Type https://www.zerodayinitiative.com/advisories/ZDI-21-657/ No Types Assigned https://www.zerodayinitiative.com/advisories/ZDI-21-657/ Third Party Advisory, VDB Entry Removed CWE NIST CWE-617 Added CWE NIST CWE-190 Added CPE Configuration OR *cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.1.1 Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vsphere:*:* *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:aff_a250_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:aff_a250:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:aff_500f_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:aff_500f:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf [No Types Assigned] -
CVE Modified by [email protected]
Jun. 07, 2021
Action Type Old Value New Value Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-657/ [No Types Assigned] -
CVE Modified by [email protected]
May. 21, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210521-0006/ [No Types Assigned] -
Initial Analysis by [email protected]
May. 12, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2021/04/29/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/04/29/1 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/04/29/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/04/29/2 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/04/29/3 No Types Assigned http://www.openwall.com/lists/oss-security/2021/04/29/3 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/04/29/4 No Types Assigned http://www.openwall.com/lists/oss-security/2021/04/29/4 Mailing List, Third Party Advisory Changed Reference Type https://kb.isc.org/v1/docs/cve-2021-25215 No Types Assigned https://kb.isc.org/v1/docs/cve-2021-25215 Not Applicable Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4909 No Types Assigned https://www.debian.org/security/2021/dsa-4909 Third Party Advisory Added CWE NIST CWE-617 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.0.0 up to (excluding) 9.11.31 *cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.12.0 up to (excluding) 9.16.15 *cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.17.0 up to (excluding) 9.17.12 -
CVE Modified by [email protected]
May. 04, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html [No Types Assigned] -
CVE Modified by [email protected]
May. 01, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4909 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 29, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/04/29/4 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 29, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/04/29/2 [No Types Assigned] Added Reference http://www.openwall.com/lists/oss-security/2021/04/29/3 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 29, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/04/29/1 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-25216
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-25216
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
44.74 }} 5.96%
score
0.97375
percentile