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High 7.5Published Nov 6, 2020
CVE-2020-28196MIT 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 l…
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 13 other products. Add what you run to find out whether that includes you.
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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.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-674
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
mit kerberos_5 mit:kerberos_5 | before 1.17.2; from 1.18.0 before 1.18.3 | NVD |
fedoraproject fedora fedoraproject:fedora | 31 | NVD |
netapp active_iq_unified_manager netapp:active_iq_unified_manager | all versions; all versions | NVD |
netapp cloud_backup netapp:cloud_backup | all versions | NVD |
netapp oncommand_insight netapp:oncommand_insight | all versions | NVD |
netapp oncommand_workflow_automation netapp:oncommand_workflow_automation | all versions | NVD |
netapp snapcenter netapp:snapcenter | all versions | NVD |
oracle communications_cloud_native_core_policy oracle:communications_cloud_native_core_policy | 1.14.0 | NVD |
oracle communications_offline_mediation_controller oracle:communications_offline_mediation_controller | 12.0.0.3.0 | NVD |
oracle communications_pricing_design_center oracle:communications_pricing_design_center | 12.0.0.3.0 | NVD |
oracle mysql_server oracle:mysql_server | through 8.0.23 | NVD |
References
- https://lists.debian.org/debian-lts-announce/2020/11/msg00011.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73IGOG6CZAVMVNS4GGRMOLOZ7B6QVA7F/vendor-advisory, x-refsource-fedora
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KPH2V3WSQTELROZK3GFCPQDOFLKIZ6H5/vendor-advisory, x-refsource-fedora
- https://security.gentoo.org/glsa/202011-17vendor-advisory, x-refsource-gentoo, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/vendor-advisory, x-refsource-fedora
- https://www.debian.org/security/2020/dsa-4795vendor-advisory, x-refsource-debian, third-party-advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlx-refsource-misc, patch, third-party-advisory
- https://security.netapp.com/advisory/ntap-20210513-0002/x-refsource-confirm, third-party-advisory
- https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfdx-refsource-confirm, patch, third-party-advisory
- https://security.netapp.com/advisory/ntap-20201202-0001/x-refsource-confirm, third-party-advisory
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Emailing-list, x-refsource-mlist
- https://www.oracle.com//security-alerts/cpujul2021.htmlx-refsource-misc, patch, third-party-advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlx-refsource-misc, patch, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.