cbcvebase.
CVE-2017-3241
published 2017-01-27

CVE-2017-3241: Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI). Supported versions that are affected are Java SE…

PriorityP273critical9CVSS 3.0
AVNACHPRNUINSCCHIHAH
EXPLOIT
EPSS
32.84%
98.2th percentile
Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI). Supported versions that are affected are Java SE: 6u131, 7u121 and 8u112; Java SE Embedded: 8u111; JRockit: R28.3.12. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded, JRockit. While the vulnerability is in Java SE, Java SE Embedded, JRockit, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded, JRockit. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS v3.0 Base Score 9.0 (Confidentiality, Integrity and Availability impacts).

Affected

13 ranges
VendorProductVersion rangeFixed in
debianopenjdk-8< openjdk-8 8u121-b13-1 (sid)openjdk-8 8u121-b13-1 (sid)
oraclejava_se
oraclejava_se
oraclejava_se
oraclejava_se_embedded
oraclejdk
oraclejdk
oraclejdk
oraclejre
oraclejre
oraclejre
oraclejrockit
oraclejrockit

Detection & IOCsextracted from sources · hover to see the quote

bytes
\xac\xed\x00\x05 (Java serialization magic header)
  • Monitor for untrusted deserialization in RMI registry and DCG (Distributed Garbage Collector) services; any unauthenticated remote input reaching ObjectInputStream.readObject() via RMI should be treated as suspicious.
  • Check for absence of serialization filter properties (sun.rmi.registry.registryFilter, sun.rmi.transport.dgcFilter, jdk.serialFilter) in java.security configuration; unfiltered RMI endpoints are vulnerable.
  • ·Affected versions are Java SE 6u131, 7u121, 8u112; Java SE Embedded 8u111; JRockit R28.3.12. The fix was introduced in Oracle JDK 8u121, 7u131, and 6u141.
  • ·The vulnerability is exploitable only via RMI network protocols without requiring Untrusted Java Web Start or applets; web services exposing RMI are at risk.
  • ·The serialization filter feature (JEP 290) must be explicitly configured; no filter is defined by default, leaving RMI endpoints unprotected even after patching if not configured.

CVSS provenance

nvdv3.09.0CRITICALCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv9.0CRITICAL
vendor_debian9.0CRITICAL
vendor_redhat9.0CRITICAL
vendor_ubuntu7.5HIGH
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