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CVE-2021-25219

MEDIUM
Published 2021-10-27T21:10:10.088929Z
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CVSS Score

V3.1
5.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.658
Higher than 65.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

Description

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ISC

BIND9

Affected Versions:

Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36 Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22 Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1 Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1 Development Branch 9.17 9.17.0 through versions before 9.17.19

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-x6vq-rxvf-3ggc

Advisory Details

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-25219
WEB https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
WEB https://kb.isc.org/v1/docs/cve-2021-25219
WEB https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX
WEB https://security.gentoo.org/glsa/202210-25
WEB https://security.netapp.com/advisory/ntap-20211118-0002
WEB https://www.debian.org/security/2021/dsa-4994
WEB https://www.oracle.com/security-alerts/cpuapr2022.html

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: May 24, 2022

References

https://kb.isc.org/v1/docs/cve-2021-25219
https://www.debian.org/security/2021/dsa-4994
https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/
https://www.oracle.com/security-alerts/cpuapr2022.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://security.netapp.com/advisory/ntap-20211118-0002/
https://security.gentoo.org/glsa/202210-25
Published: 2021-10-27T21:10:10.088929Z
Last Modified: 2024-09-16T17:33:38.865Z
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