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Digest · Tuesday

Security digest: April 14, 2020

1 editorial brief.

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Take stock

  • Check exposure: WebLogic CVE-2020-2883: T3/IIOP Deserialization RCE. Owners of WebLogic Server 10.3.6, 12.1.3, 12.2.1.3 or 12.2.1.4 without the April 2020 or later patches, and anyone exposing the T3 or IIOP listener beyond trusted hosts.
  • None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

Editorial briefs

Check exposure

· Vulnerability · CVE-2020-2883

WebLogic CVE-2020-2883: T3/IIOP Deserialization RCE

Exploited since 2020 and fixed since April 2020; the 2025 KEV listing adds no new campaign, but any WebLogic server with T3 or IIOP reachable from untrusted networks and old patches is still an easy takeover.

Must act: Owners of WebLogic Server 10.3.6, 12.1.3, 12.2.1.3 or 12.2.1.4 without the April 2020 or later patches, and anyone exposing the T3 or IIOP listener beyond trusted hosts.

Can relax: Teams that apply Oracle's quarterly patches to WebLogic and block T3 and IIOP at the edge; the bug needs network access to those protocols.

  1. Inventory WebLogic servers and list applied patches with $ORACLE_HOME/OPatch/opatch lspatches.
  2. Apply the current WebLogic patch set update; later T3/IIOP bugs such as CVE-2024-21182 are also in KEV.
  3. Plan upgrades off 10.3.6 and 12.1.3; Oracle's July 2024 advisory lists only 12.2.1.4.0 and 14.1.1.0.0 as affected supported versions.

Read the brief →

Known exploited (CISA KEV) 0

Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.

None.

Critical advisories by ecosystem 0

GitHub-reviewed advisories rated critical, published this day (Pacific time).

None.