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CVE-2020-28196

HIGH
7.5
CVSS Score
Published: November 6, 2020 at 07:07 AM UTC
Updated: October 14, 2026 at 10:17 AM UTC
11 products affected across 4 vendorsFedoraMySQL ServerOnCommand Insight

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Severity
HIGH7.5
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
31
Kerberos 5· Mit
95%
v < 1.17.21.18.0 ≤ v < 1.18.3
Affected range stops below 1.17.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.18.3, so it looks safe — our inference, not a vendor statement
Active IQ Unified Manager· NetAppnpm
95%
All versions
Cloud Backup· NetAppdrupal
95%
All versions
OnCommand Insight· NetAppdrupal
95%
All versions
OnCommand Workflow Automation· NetApp
95%
All versions
SnapCenter· NetAppdrupal
95%
All versions
Communications Cloud Native Core Policy· Oracle
95%
1.14.0
Communications Offline Mediation Controller· Oracle
95%
12.0.0.3.0
Communications Pricing Design Center· Oraclenpm
95%
12.0.0.3.0

References (15)

x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73IGOG6CZAVMVNS4GGRMOLOZ7B6QVA7F/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KPH2V3WSQTELROZK3GFCPQDOFLKIZ6H5/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202011-17

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-674

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