CVE-2020-2883

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Recent assessments:

hrbrmstr at May 02, 2020 12:18am UTC reported:

Well, it’s bad when even Oracle decides to raise the alarm bells (wayback machine was down, so no permalink yet) about it.

They’ve detected active exploitation attempts against WebLogic servers.

T3 is Weblogic’s proprietary implementation of the RMI spec and is primarily used as a layer to enable JNDI calls by apps/clients.

It appears there’s PoC for it but I haven’t tested it yet. Since it’s yet-another deserialization vulnerability and there’s existing PoC code for similar RMI RCE, Oracle’s observations are likely correct.

space-r7 at May 15, 2020 7:15pm UTC reported:

Well, it’s bad when even Oracle decides to raise the alarm bells (wayback machine was down, so no permalink yet) about it.

They’ve detected active exploitation attempts against WebLogic servers.

T3 is Weblogic’s proprietary implementation of the RMI spec and is primarily used as a layer to enable JNDI calls by apps/clients.

It appears there’s PoC for it but I haven’t tested it yet. Since it’s yet-another deserialization vulnerability and there’s existing PoC code for similar RMI RCE, Oracle’s observations are likely correct.

Assessed Attacker Value: 4
Assessed Attacker Value: 4Assessed Attacker Value: 4