01 Record
CVE-2020-17049
Kerberos KDC Security Feature Bypass Vulnerability
MediumPUBLISHEDCNA: microsoft
CNA base score6.6 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
02 Description
Kerberos KDC Security Feature Bypass Vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 13.79% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.3% of scored records. A rank, not a probability.
- NVD base score
- 6.6 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-11-11 00:00Z5 YR AGO
- Last updated
- 2024-11-15 16:12Z1 YR AGO
- Reserved
- 2020-08-04
- Assigning CNA
- microsoft
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.6)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Weaknesses
- Data version
- 5.1
- Document digest
- bd364578b3b99c24ebfaacab2d34757ce4441562adfae1bc5bc4a6511e9fc841
05 Affected products
VendorProductVersionsPlatforms
MicrosoftWindows Server, version 1909 (Server Core installation)10.0.0 to < publicationx64-based Systems
MicrosoftWindows Server, version 1903 (Server Core installation)10.0.0 to < publicationx64-based Systems
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.0 to < 6.0.6003.2116732-bit Systems, x64-based Systems
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.0.0 to < 6.1.7601.25661x64-based Systems
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.0 to < 6.3.9600.20069x64-based Systems
06 References
- portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049
- www.openwall.com[oss-security] 20211110 Fwd: Samba 4.15.2, 4.14.10, 4.13.14 Security Releases are available for Downloadhttp://www.openwall.com/lists/oss-security/2021/11/10/3
- security.gentoo.orgGLSA-202309-06https://security.gentoo.org/glsa/202309-06
07 Fixed in
AlmaLinux 8
- bind-dyndb-ldap Fixed in 11.6-4.module_el8.6.0+3339+9b5fdd22
- custodia Fixed in 0.6.0-3.module_el8.6.0+2881+2f24dc92
- ipa-client Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-epn Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-samba Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-healthcheck Fixed in 0.12-3.module_el8.9.0+3651+d05ea4c5
- ipa-healthcheck-core Fixed in 0.12-3.module_el8.9.0+3651+d05ea4c5
- ipa-python-compat Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-selinux Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-dns Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-trust-ad Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- opendnssec Fixed
A version is affected if any line below covers it.
- Affected before 2.1.7-1.module_el8.6.0+2881+2f24dc92
- Affected before 2.1.7-1.module_el8.6.0+3031+2f24dc92
- python3-custodia Fixed in 0.6.0-3.module_el8.6.0+2881+2f24dc92
- python3-ipaclient Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipalib Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipaserver Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipatests Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-jwcrypto Fixed in 0.5.0-1.1.module_el8.7.0+3349+cfeff52e
- python3-kdcproxy Fixed in 0.4-5.module_el8.9.0+3682+f63caf3e
- python3-pyusb Fixed in 1.0.0-9.1.module_el8.7.0+3349+cfeff52e
- python3-qrcode Fixed in 5.1-12.module_el8.6.0+2881+2f24dc92
- python3-qrcode-core Fixed in 5.1-12.module_el8.6.0+2881+2f24dc92
- python3-yubico Fixed in 1.3.2-9.1.module_el8.7.0+3349+cfeff52e
- slapi-nis Fixed in 0.60.0-4.module_el8.9.0+3682+f63caf3e.alma.1
- softhsm Fixed
A version is affected if any line below covers it.
- Affected before 2.6.0-5.module_el8.6.0+2881+2f24dc92
- Affected before 2.6.0-5.module_el8.6.0+3031+2f24dc92
- softhsm-devel Fixed
A version is affected if any line below covers it.
- Affected before 2.6.0-5.module_el8.6.0+2881+2f24dc92
- Affected before 2.6.0-5.module_el8.6.0+3031+2f24dc92
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- krb5-devel Fixed in 1.20.1-8.el9
- krb5-libs Fixed in 1.20.1-8.el9
- krb5-pkinit Fixed in 1.20.1-8.el9
- krb5-server Fixed in 1.20.1-8.el9
- krb5-server-ldap Fixed in 1.20.1-8.el9
- krb5-workstation Fixed in 1.20.1-8.el9
- libkadm5 Fixed in 1.20.1-8.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- bind-dyndb-ldap Fixed in 11.6-4.module_el8.6.0+3339+9b5fdd22
- custodia Fixed in 0.6.0-3.module_el8.6.0+2881+2f24dc92
- ipa-client Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-epn Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-client-samba Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-healthcheck Fixed in 0.12-3.module_el8.9.0+3651+d05ea4c5
- ipa-healthcheck-core Fixed in 0.12-3.module_el8.9.0+3651+d05ea4c5
- ipa-python-compat Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-selinux Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-common Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-dns Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- ipa-server-trust-ad Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- opendnssec Fixed
A version is affected if any line below covers it.
- Affected before 2.1.7-1.module_el8.6.0+2881+2f24dc92
- Affected before 2.1.7-1.module_el8.6.0+3031+2f24dc92
- python3-custodia Fixed in 0.6.0-3.module_el8.6.0+2881+2f24dc92
- python3-ipaclient Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipalib Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipaserver Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-ipatests Fixed in 4.9.12-11.module_el8.9.0+3715+e4197dc9.alma.1
- python3-jwcrypto Fixed in 0.5.0-1.1.module_el8.7.0+3349+cfeff52e
- python3-kdcproxy Fixed in 0.4-5.module_el8.9.0+3682+f63caf3e
- python3-pyusb Fixed in 1.0.0-9.1.module_el8.7.0+3349+cfeff52e
- python3-qrcode Fixed in 5.1-12.module_el8.6.0+2881+2f24dc92
- python3-qrcode-core Fixed in 5.1-12.module_el8.6.0+2881+2f24dc92
- python3-yubico Fixed in 1.3.2-9.1.module_el8.7.0+3349+cfeff52e
- slapi-nis Fixed in 0.60.0-4.module_el8.9.0+3682+f63caf3e.alma.1
- softhsm Fixed
A version is affected if any line below covers it.
- Affected before 2.6.0-5.module_el8.6.0+2881+2f24dc92
- Affected before 2.6.0-5.module_el8.6.0+3031+2f24dc92
- softhsm-devel Fixed
A version is affected if any line below covers it.
- Affected before 2.6.0-5.module_el8.6.0+2881+2f24dc92
- Affected before 2.6.0-5.module_el8.6.0+3031+2f24dc92
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- krb5-devel Fixed in 1.20.1-8.el9
- krb5-libs Fixed in 1.20.1-8.el9
- krb5-pkinit Fixed in 1.20.1-8.el9
- krb5-server Fixed in 1.20.1-8.el9
- krb5-server-ldap Fixed in 1.20.1-8.el9
- krb5-workstation Fixed in 1.20.1-8.el9
- libkadm5 Fixed in 1.20.1-8.el9
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.