CVE-2011-2487
Description
A flaw was found in JBoss web services where the services used a weak symmetric encryption protocol, PKCS#1 v1.5. An attacker could use this weakness in chosen-ciphertext attacks to recover the symmetric key and conduct further attacks.
Statement
This flaw affects Apache CXF (WSS4J) and jbossws-native as shipped with various JBoss products. It does not affect JBoss Enterprise Application Platform 6 and JBoss Application Server 7.1.1 and above. These products include WSS4J 1.6.5, which incorporates a fix for this flaw. On affected products, this flaw can be mitigated by using the RSA-OAEP key wrap algorithm, instead of the default RSA-v1.5 algorithm. To use RSA-OAEP, edit the jboss-ws-security configuration file and add the property keyWrapAlgorithm="rsa_oaep" to the encrypt element.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | 4.3 | N/A |
| Attack Vector | Network | Network | N/A |
| Access Complexity | Low | Medium | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | Complete | Partial | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: AV:N/AC:L/Au:N/C:C/I:N/A:N
NVD: AV:N/AC:M/Au:N/C:P/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
The confidentiality of sensitive data may be compromised by the use of a broken or risky cryptographic algorithm.
Integrity
Technical Impact: Modify Application Data
The integrity of sensitive data may be compromised by the use of a broken or risky cryptographic algorithm.
Accountability,Non-Repudiation
Technical Impact: Hide Activities
If the cryptographic algorithm is used to ensure the identity of the source of the data (such as digital signatures), then a broken algorithm will compromise this scheme and the source of the data cannot be proven.
Acknowledgements
Red Hat would like to thank Juraj Somorovsky (Ruhr-University Bochum) for reporting this issue.
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