CVE-2021-36222
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-36222
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-36222.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-36222
- Downstream
- Related
- Published
- 2021-07-22T18:15:23Z
- Modified
- 2025-09-19T13:06:53.443537Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
ecverify in kdc/kdcpreauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.
- References
-
- https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
- https://github.com/krb5/krb5/releases
- https://security.netapp.com/advisory/ntap-20211022-0003/
- https://security.netapp.com/advisory/ntap-20211104-0007/
- https://web.mit.edu/kerberos/advisories/
- https://www.debian.org/security/2021/dsa-4944
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.alpinelinux.org/vuln/CVE-2021-36222
Affected packages
Alpine:v3.12
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
Alpine:v3.13
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.14
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.15
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.16
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.17
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.18
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.19
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.20
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.21
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Alpine:v3.22
krb5
Package
- Name
- krb5
- Purl
- pkg:apk/alpine/krb5?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.18.4-r0
Affected versions
1.*
1.11-r0
1.11-r1
1.11-r2
1.11.2-r0
1.11.2-r1
1.11.2-r2
1.11.3-r0
1.11.4-r0
1.12.1-r0
1.12.2-r0
1.13-r0
1.13-r1
1.13.1-r0
1.13.1-r1
1.13.2-r0
1.13.2-r1
1.13.2-r2
1.14-r0
1.14-r1
1.14-r2
1.14.3-r0
1.14.3-r1
1.14.3-r2
1.15.1-r0
1.15.2-r0
1.15.2-r1
1.15.2-r2
1.15.3-r0
1.15.3-r1
1.15.4-r0
1.15.5-r0
1.17-r0
1.17.1-r0
1.18-r0
1.18.1-r0
1.18.2-r0
1.18.3-r0
1.18.3-r1
Git
github.com/krb5/krb5
Affected ranges
- Type
- GIT
- Repo
- https://github.com/krb5/krb5
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Database specific
{
"vanir_signatures": [
{
"source": "https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562",
"signature_version": "v1",
"signature_type": "Line",
"id": "CVE-2021-36222-4eafeb47",
"target": {
"file": "src/kdc/kdc_preauth_ec.c"
},
"digest": {
"line_hashes": [
"11212649172673180521140604104188591304",
"228806048721091709572489333951828356198",
"321289942291638231764076182789317623244",
"93469301882783218346945084207915710111"
],
"threshold": 0.9
},
"deprecated": false
},
{
"source": "https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562",
"signature_version": "v1",
"signature_type": "Function",
"id": "CVE-2021-36222-f3fc596a",
"target": {
"file": "src/kdc/kdc_preauth_ec.c",
"function": "ec_verify"
},
"digest": {
"function_hash": "137210320503581614737329061627982532169",
"length": 2350.0
},
"deprecated": false
}
]
}