Incorrect password hashing algorithm in Bouncy Castle
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-28052 |
| CWE-ID | CWE-1025 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
The Bouncy Castle Crypto Package For Java Universal components / Libraries / Libraries used by multiple products |
| Vendor | Legion of the Bouncy Castle Inc. |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Comparison using wrong factors
EUVDB-ID: #VU49086
Risk: High
CVSSv3.1:
CVE-ID: CVE-2020-28052
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to brute-force password hashes.
The vulnerability exists due to comparison error in OpenBSDBCrypt.checkPassword() function in core/src/main/java/org/bouncycastle/crypto/generators/OpenBSDBCrypt.java when matching passwords with hashes. A remote attacker can pass an incorrect password that will be accepted as a valid one by the library, bypass authentication process and gain unauthorized access to the application that uses vulnerable version of Bouncy Castle.
MitigationInstall updates from vendor's website.
Vulnerable software versionsThe Bouncy Castle Crypto Package For Java: 1.65 - 1.66
Fixed software versionsCPE2.3 External links
http://github.com/bcgit/bc-java/wiki/CVE-2020-28052
http://www.bouncycastle.org/releasenotes.html
http://www.synopsys.com/blogs/software-security/cve-2020-28052-bouncy-castle/
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
