Memory leak in ECDSA DNSSEC verification code

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Summary

CVECVE-2022-38177
StatePUBLISHED
Assignerisc
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-09-21 11:15:09 UTC
Updated2026-09-01 19:44:42 UTC
DescriptionBy spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.026600000 probability, percentile 0.846660000 (date 2026-09-03)

Problem Types: CWE-401 | In BIND 9.8.4 -> 9.16.32 and versions 9.9.4-S1 -> 9.11.37-S1, 9.16.8-S1 -> 9.16.32-S1 of the BIND Supported Preview Edition, the DNSSEC verification code for the ECDSA algorithm leaks memory when there is a signature length mismatch. | CWE-401 CWE-401 Missing Release of Memory after Effective Lifetime

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Fedoraproject Fedora 35 All All All
Operating System Fedoraproject Fedora 36 All All All
Operating System Fedoraproject Fedora 37 All All All
Application Isc Bind 9.10.5 s1 All All
Application Isc Bind 9.10.7 s1 All All
Application Isc Bind 9.11.12 s1 All All
Application Isc Bind 9.11.14-s1 All All All
Application Isc Bind 9.11.19-s1 All All All
Application Isc Bind 9.11.21 s1 All All
Application Isc Bind 9.11.27 s1 All All
Application Isc Bind 9.11.29 s1 All All
Application Isc Bind 9.11.3 s1 All All
Application Isc Bind 9.11.35 s1 All All
Application Isc Bind 9.11.37 s1 All All
Application Isc Bind 9.11.5 s3 All All
Application Isc Bind 9.11.5 s3 All All
Application Isc Bind 9.11.5 s5 All All
Application Isc Bind 9.11.5 s6 All All
Application Isc Bind 9.11.6 s1 All All
Application Isc Bind 9.11.7 s1 All All
Application Isc Bind 9.11.8 s1 All All
Application Isc Bind 9.16.11 s1 All All
Application Isc Bind 9.16.13 s1 All All
Application Isc Bind 9.16.21 s1 All All
Application Isc Bind 9.16.32 s1 All All
Application Isc Bind 9.16.8 s1 All All
Application Isc Bind 9.9.12 s1 All All
Application Isc Bind 9.9.13 s1 All All
Application Isc Bind 9.9.3 s1 All All
Application Isc Bind 9.9.3 s1 All All
Application Isc Bind All All All All
Application Netapp Active Iq Unified Manager - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA ISC BIND9 affected Open Source Branches 9.8 through 9.16 9.8.4 through versions before 9.16.33 Not specified
CNA ISC BIND9 affected Supported Preview Branches 9.9-S through 9.11-S 9.9.4-S1 through versions up to and including 9.11.37-S1 Not specified
CNA ISC BIND9 affected Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1 Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 36 Update: bind-9.16.33-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Debian -- Security Information -- DSA-5235-1 bind9 af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[SECURITY] Fedora 35 Update: bind-dyndb-ldap-11.9-16.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
ISC BIND: Multiple Vulnerabilities (GLSA 202210-25) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] [DLA 3138-1] bind9 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
CVE-2022-38177 ISC BIND Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
CVE-2022-38177: Memory leak in ECDSA DNSSEC verification code af854a3a-2127-422b-91ae-364da2661108 kb.isc.org Patch, Third Party Advisory
oss-security - ISC has disclosed six vulnerabilities in BIND (CVE-2022-2795, CVE-2022-2881, CVE-2022-2906, CVE-2022-3080, CVE-2022-38177, CVE-2022-38178) af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
[SECURITY] Fedora 37 Update: bind-9.18.7-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
FEDORA:FEDORA-2022-8268735e06 MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: bind-dyndb-ldap-11.9-16.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: bind-9.18.7-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.33, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.16.33-S1.

Workarounds

CNA: Disable the following algorithms in your configuration using the disable-algorithms option: ECDSAP256SHA256, ECDSAP384SHA384. Note that this causes zones signed with these algorithms to be treated as insecure.

Exploits

CNA: This flaw was discovered in internal testing. We are not aware of any active exploits.

Legacy QID Mappings

  • 15137 ISC BIND Memory Leak Vulnerability (CVE-2022-38177)
  • 160119 Oracle Enterprise Linux Security Update for bind (ELSA-2022-6763)
  • 160122 Oracle Enterprise Linux Security Update for bind (ELSA-2022-6765)
  • 160125 Oracle Enterprise Linux Security Update for bind (ELSA-2022-6778)
  • 160126 Oracle Enterprise Linux Security Update for bind9.16 (ELSA-2022-6781)
  • 181072 Debian Security Update for bind9 (DSA 5235-1)
  • 181112 Debian Security Update for bind9 (DLA 3138-1)
  • 184369 Debian Security Update for bind9 (CVE-2022-38177)
  • 198945 Ubuntu Security Notification for Bind Vulnerabilities (USN-5626-1)
  • 240701 Red Hat Update for bind (RHSA-2022:6765)
  • 240702 Red Hat Update for bind (RHSA-2022:6763)
  • 240703 Red Hat Update for bind9.16 (RHSA-2022:6781)
  • 240706 Red Hat Update for bind (RHSA-2022:6778)
  • 240707 Red Hat Update for bind (RHSA-2022:6780)
  • 240708 Red Hat Update for bind (RHSA-2022:6779)
  • 257195 CentOS Security Update for bind (CESA-2022:6765)
  • 283150 Fedora Security Update for bind (FEDORA-2022-8268735e06)
  • 283158 Fedora Security Update for bind (FEDORA-2022-b197d64471)
  • 296084 Oracle Solaris 11.4 Support Repository Update (SRU) 50.126.3 Missing (CPUOCT2022)
  • 330122 IBM AIX Denial of Service (DoS) ISC BIND Vulnerability (bind_advisory22)
  • 354835 Amazon Linux Security Advisory for bind : ALAS2-2023-2001
  • 355145 Amazon Linux Security Advisory for bind : ALAS2023-2023-161
  • 377619 Alibaba Cloud Linux Security Update for bind (ALINUX2-SA-2022:0043)
  • 377669 F5 BIG-IP Bind vulnerability cve-2022-38177 (K27155546)
  • 502507 Alpine Linux Security Update for bind
  • 502711 Alpine Linux Security Update for bind
  • 672407 EulerOS Security Update for bind (EulerOS-SA-2022-2788)
  • 672439 EulerOS Security Update for bind (EulerOS-SA-2022-2838)
  • 672456 EulerOS Security Update for bind (EulerOS-SA-2022-2813)
  • 672477 EulerOS Security Update for dhcp (EulerOS-SA-2023-1032)
  • 672503 EulerOS Security Update for bind (EulerOS-SA-2023-1002)
  • 672510 EulerOS Security Update for dhcp (EulerOS-SA-2023-1007)
  • 672524 EulerOS Security Update for bind (EulerOS-SA-2023-1027)
  • 672534 EulerOS Security Update for bind (EulerOS-SA-2023-1117)
  • 672543 EulerOS Security Update for bind (EulerOS-SA-2023-1093)
  • 672629 EulerOS Security Update for dhcp (EulerOS-SA-2023-1353)
  • 672652 EulerOS Security Update for dhcp (EulerOS-SA-2023-1381)
  • 672781 EulerOS Security Update for bind (EulerOS-SA-2023-1489)
  • 673277 EulerOS Security Update for dhcp (EulerOS-SA-2023-2580)
  • 673317 EulerOS Security Update for dhcp (EulerOS-SA-2023-2610)
  • 710661 Gentoo Linux ISC BIND Multiple Vulnerabilities (GLSA 202210-25)
  • 752651 SUSE Enterprise Linux Security Update for bind (SUSE-SU-2022:3499-1)
  • 752699 SUSE Enterprise Linux Security Update for bind (SUSE-SU-2022:3682-1)
  • 752717 SUSE Enterprise Linux Security Update for bind (SUSE-SU-2022:3729-1)
  • 752737 SUSE Enterprise Linux Recommended update for bind (SUSE-SU-2022:3767-1)
  • 904039 Common Base Linux Mariner (CBL-Mariner) Security Update for bind (11010)
  • 904041 Common Base Linux Mariner (CBL-Mariner) Security Update for bind (11001)
  • 904540 Common Base Linux Mariner (CBL-Mariner) Security Update for bind (11010-1)
  • 904645 Common Base Linux Mariner (CBL-Mariner) Security Update for bind (11001-1)
  • 940670 AlmaLinux Security Update for bind (ALSA-2022:6778)
  • 940673 AlmaLinux Security Update for bind9.16 (ALSA-2022:6781)
  • 940679 AlmaLinux Security Update for bind (ALSA-2022:6763)
  • 960290 Rocky Linux Security Update for bind (RLSA-2022:6778)
  • 960351 Rocky Linux Security Update for bind9.16 (RLSA-2022:6781)
  • 960475 Rocky Linux Security Update for bind (RLSA-2022:6763)

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