CVE-2020-28052

Exp

An issue was discovered in Legion of the Bouncy Castle BC Java 1.65 and 1.66. The OpenBSDBCrypt.checkPassword utility method compared incorrect data when checking the password, allowing incorrect passwords to indicate they were matching with previously hashed ones that were different.

Published: 2020-12-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-28052 is rated High Exploit Risk (83.1/100): CVSS High severity, with high exploitation likelihood (EPSS 7.14%, 93th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.04% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-28052

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-28052

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.10% 7.14% +3.04%
2 2026-03-11 3.06% 4.10% +1.04%
3 2026-01-05 — 3.06% —

Full EPSS history (39 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-28052

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2020-28052

GitHub Security Advisory for CVE-2020-28052

GHSA-73xv-w5gp-frxh · Severity: high · Ecosystem: maven — Logic error in Legion of the Bouncy Castle BC Java

OS Trackers for CVE-2020-28052

vendor priority summary link
debian not yet assigned CVE-2020-28052 not yet assigned priority: Debian including 1 source packages (bouncycastle), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-28052
redhat high — https://access.redhat.com/security/cve/CVE-2020-28052
ubuntu medium CVE-2020-28052 medium priority: Ubuntu including 1 source packages (bouncycastle), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, not-affected 6, DNE 1, released 1. https://ubuntu.com/security/CVE-2020-28052

Affected software / configurations for CVE-2020-28052

Vendor Product Version Raw CPE
bouncycastle bc-java 1.65 cpe:2.3:a:bouncycastle:bc-java:1.65:*:*:*:*:*:*:*
bouncycastle bc-java 1.66 cpe:2.3:a:bouncycastle:bc-java:1.66:*:*:*:*:*:*:*
apache karaf 4.3.2 cpe:2.3:a:apache:karaf:4.3.2:*:*:*:*:*:*:*
oracle banking_corporate_lending_process_management 14.2.0 cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.2.0:*:*:*:*:*:*:*
oracle banking_corporate_lending_process_management 14.3.0 cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.3.0:*:*:*:*:*:*:*
oracle banking_corporate_lending_process_management 14.5.0 cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.5.0:*:*:*:*:*:*:*
oracle banking_credit_facilities_process_management 14.2.0 cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.2.0:*:*:*:*:*:*:*
oracle banking_credit_facilities_process_management 14.3.0 cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.3.0:*:*:*:*:*:*:*
oracle banking_credit_facilities_process_management 14.5.0 cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.5.0:*:*:*:*:*:*:*
oracle banking_extensibility_workbench 14.2.0 cpe:2.3:a:oracle:banking_extensibility_workbench:14.2.0:*:*:*:*:*:*:*
oracle banking_extensibility_workbench 14.3.0 cpe:2.3:a:oracle:banking_extensibility_workbench:14.3.0:*:*:*:*:*:*:*
oracle banking_extensibility_workbench 14.5.0 cpe:2.3:a:oracle:banking_extensibility_workbench:14.5.0:*:*:*:*:*:*:*
oracle banking_supply_chain_finance 14.2.0 cpe:2.3:a:oracle:banking_supply_chain_finance:14.2.0:*:*:*:*:*:*:*
oracle banking_supply_chain_finance 14.3.0 cpe:2.3:a:oracle:banking_supply_chain_finance:14.3.0:*:*:*:*:*:*:*
oracle banking_supply_chain_finance 14.5.0 cpe:2.3:a:oracle:banking_supply_chain_finance:14.5.0:*:*:*:*:*:*:*
oracle banking_virtual_account_management 14.2.0 cpe:2.3:a:oracle:banking_virtual_account_management:14.2.0:*:*:*:*:*:*:*
oracle banking_virtual_account_management 14.3.0 cpe:2.3:a:oracle:banking_virtual_account_management:14.3.0:*:*:*:*:*:*:*
oracle banking_virtual_account_management 14.5.0 cpe:2.3:a:oracle:banking_virtual_account_management:14.5.0:*:*:*:*:*:*:*
oracle blockchain_platform < 21.1.2 cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:*
oracle commerce_guided_search 11.3.2 cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:*
oracle communications_application_session_controller 3.9m0p3 cpe:2.3:a:oracle:communications_application_session_controller:3.9m0p3:*:*:*:*:*:*:*
oracle communications_cloud_native_core_network_slice_selection_function 1.2.1 cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.2.1:*:*:*:*:*:*:*
oracle communications_convergence 3.0.2.2.0 cpe:2.3:a:oracle:communications_convergence:3.0.2.2.0:*:*:*:*:*:*:*
oracle communications_pricing_design_center 12.0.0.3.0 cpe:2.3:a:oracle:communications_pricing_design_center:12.0.0.3.0:*:*:*:*:*:*:*
oracle communications_session_report_manager >= 8.0.0, <= 8.2.4.0 cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*
oracle communications_session_route_manager >= 8.2.0, <= 8.2.4 cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*
oracle jd_edwards_enterpriseone_tools <= 9.2.5.3 cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*
oracle peoplesoft_enterprise_peopletools 8.56 cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:*
oracle peoplesoft_enterprise_peopletools 8.57 cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*
oracle peoplesoft_enterprise_peopletools 8.58 cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*
oracle utilities_framework 4.3.0.6.0 cpe:2.3:a:oracle:utilities_framework:4.3.0.6.0:*:*:*:*:*:*:*
oracle utilities_framework 4.4.0.0.0 cpe:2.3:a:oracle:utilities_framework:4.4.0.0.0:*:*:*:*:*:*:*
oracle utilities_framework 4.4.0.2.0 cpe:2.3:a:oracle:utilities_framework:4.4.0.2.0:*:*:*:*:*:*:*
oracle utilities_framework 4.4.0.3.0 cpe:2.3:a:oracle:utilities_framework:4.4.0.3.0:*:*:*:*:*:*:*
oracle webcenter_portal 11.1.1.9.0 cpe:2.3:a:oracle:webcenter_portal:11.1.1.9.0:*:*:*:*:*:*:*
oracle webcenter_portal 12.2.1.3.0 cpe:2.3:a:oracle:webcenter_portal:12.2.1.3.0:*:*:*:*:*:*:*
oracle webcenter_portal 12.2.1.4.0 cpe:2.3:a:oracle:webcenter_portal:12.2.1.4.0:*:*:*:*:*:*:*
oracle communications_messaging_server 8.0.2 cpe:2.3:o:oracle:communications_messaging_server:8.0.2:*:*:*:*:*:*:*
oracle communications_messaging_server 8.1 cpe:2.3:o:oracle:communications_messaging_server:8.1:*:*:*:*:*:*:*

References for CVE-2020-28052

URL Tags
https://github.com/bcgit/bc-java/wiki/CVE-2020-28052 Mitigation Patch Third Party Advisory
https://lists.apache.org/thread.html/r167dbc42ef7c59802c2ca1ac14735ef9cf687c25208229993d6206fe%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r175f5a25d100dbe2b1bd3459b3ce882a84c3ff91b120ed4ff2d57b53%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r25d53acd06f29244b8a103781b0339c5e7efee9099a4d52f0c230e4a%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r2ddabd06d94b60cfb0141e4abb23201c628ab925e30742f61a04d013%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r30a139c165b3da6e0d5536434ab1550534011b1fdfcd2f5d95892c5b%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r37d332c0bf772f4982d1fdeeb2f88dd71dab6451213e69e43734eadc%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r4e1619cfefcd031fac62064a3858f5c9229eef907bd5d8ef14c594fc%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r77af3ac7c3bfbd5454546e13faf7aec21d627bdcf36c9ca240436b94%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E
https://lists.apache.org/thread.html/r954d80fd18e9dafef6e813963eb7e08c228151c2b6268ecd63b35d1f%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/rc9e441c1576bdc4375d32526d5cf457226928e9c87b9f54ded26271c%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/rcd37d9214b08067a2e8f2b5b4fd123a1f8cb6008698d11ef44028c21%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/rdcbad6d8ce72c79827ed8c635f9a62dd919bb21c94a0b64cab2efc31%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/rddd2237b8636a48d573869006ee809262525efb2b6ffa6eff50d2a2d%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/rdfd2901b8b697a3f6e2c9c6ecc688fd90d7f881937affb5144d61d6e%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/rf9abfc0223747a56694825c050cc6b66627a293a32ea926b3de22402%40%3Cissues.karaf.apache.org%3E
https://lists.apache.org/thread.html/rfc0db1f3c375087e69a239f9284ded72d04fbb55849eadde58fa9dc2%40%3Cissues.karaf.apache.org%3E
https://www.bouncycastle.org/releasenotes.html Release Notes Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Patch Third Party Advisory
https://www.synopsys.com/blogs/software-security/cve-2020-28052-bouncy-castle/ Exploit Third Party Advisory
cvelogic Threat Intelligence