CVE-2016-1000344
DHIES implementation vulnerability in bcprov-jdk14 (Maven)
What is CVE-2016-1000344 About?
The DHIES implementation in Bouncy Castle JCE Provider version 1.55 and earlier incorrectly permitted the use of ECB mode for encryption. This allows for potential information leakage and compromise of encrypted data due to ECB's insecure nature. Exploitation would likely involve cryptanalysis, requiring specialized knowledge but potentially being straightforward once an attack method is known.
Affected Software
- org.bouncycastle:bcprov-jdk14
- <1.56
- org.bouncycastle:bcprov-jdk15
- <1.56
- org.bouncycastle:bcprov-jdk15on
- <1.56
Technical Details
Prior to version 1.56, the DHIES (Diffie-Hellman Integrated Encryption Scheme) implementation within the Bouncy Castle JCE Provider inadvertently supported and allowed the use of Electronic Codebook (ECB) mode for symmetric encryption. ECB mode, considered fundamentally insecure for encrypting blocks of data that are not entirely random, encrypts identical plaintext blocks into identical ciphertext blocks. This property leaks information about patterns in the plaintext, such as repetitions in data or images, even without directly compromising the encryption key. An attacker observing encrypted traffic could analyze these patterns to infer characteristics of the original data, potentially leading to partial data recovery or more targeted attacks.
What is the Impact of CVE-2016-1000344?
Successful exploitation may allow attackers to analyze patterns in encrypted data, potentially inferring characteristics of the plaintext, which can lead to information leakage and weaken the overall security of encrypted communications.
What is the Exploitability of CVE-2016-1000344?
Exploitation of this vulnerability would require a cryptographic attack tailored to the weaknesses of ECB mode, a process that can be complex but well-understood by cryptanalysts. There are no direct authentication or privilege requirements on the target system itself, as the vulnerability lies within the cryptographic implementation. Attackers would need access to a sufficient volume of ciphertext encrypted using the vulnerable DHIES-ECB mode to perform meaningful analysis. This is primarily a remote vulnerability if the encrypted data is transmitted over a network. The likelihood of exploitation increases if an attacker can consistently capture encrypted data streams or files, and if the data contains repetitive patterns.
What are the Known Public Exploits?
| PoC Author | Link | Commentary |
|---|---|---|
| No known exploits | ||
What are the Available Fixes for CVE-2016-1000344?
Available Upgrade Options
- org.bouncycastle:bcprov-jdk15
- <1.56 → Upgrade to 1.56
- org.bouncycastle:bcprov-jdk15on
- <1.56 → Upgrade to 1.56
- org.bouncycastle:bcprov-jdk14
- <1.56 → Upgrade to 1.56
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Book a demoAdditional Resources
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://access.redhat.com/errata/RHSA-2018:2927
- https://access.redhat.com/errata/RHSA-2018:2669
- https://access.redhat.com/errata/RHSA-2018:2669
- https://github.com/bcgit/bc-java/commit/9385b0ebd277724b167fe1d1456e3c112112be1f
- https://github.com/advisories/GHSA-2j2x-hx4g-2gf4
- https://osv.dev/vulnerability/GHSA-2j2x-hx4g-2gf4
- https://security.netapp.com/advisory/ntap-20181127-0004/
- https://security.netapp.com/advisory/ntap-20181127-0004
- https://nvd.nist.gov/vuln/detail/CVE-2016-1000344
What are Similar Vulnerabilities to CVE-2016-1000344?
Similar Vulnerabilities: CVE-2016-0703 , CVE-2017-7526 , CVE-2015-1789 , CVE-2009-1389 , CVE-2008-0166
