Integer Overflow Vulnerability in libjbcrypt-java: A Security Risk for Password Hashing
Summary
UBUNTU-CVE-2015-0886: Integer overflow in the crypt_raw method in the key-stretching implementation in jBCrypt before 0.4 makes it easier for remote attackers to determine cleartext values of password hashes via a brute-force attack against h... Affects libjbcrypt-java versions < 0.4-2. Fixed in 0.4-2. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
libjbcrypt-java is a Java library that implements the jBCrypt algorithm for hashing passwords. It is widely used in applications to securely store user passwords by applying a key-stretching technique that makes brute-force attacks more difficult. However, a vulnerability in earlier versions of this library can compromise the security of password hashes, making it critical for users to be aware of and address this issue.
Vulnerability Detail
The vulnerability, identified as CVE-2015-0886, arises from an integer overflow in the crypt_raw method of the key-stretching implementation in jBCrypt versions prior to 0.4. This flaw allows remote attackers to exploit the weakness and potentially determine the cleartext values of password hashes through brute-force attacks, especially against hashes associated with the maximum exponent. The implications of this vulnerability are severe, as it undermines the integrity of password storage, exposing users to unauthorized access.
How To Fix
Minimum fixed version
0.4-2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libjbcrypt-javaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can consider implementing additional security measures such as rate limiting login attempts or using alternative password hashing libraries that are not affected by this vulnerability until the package can be updated.
Conclusion
The integer overflow vulnerability in libjbcrypt-java poses a significant risk to applications that rely on this library for password hashing. It is crucial for developers and system administrators to update to the patched version to mitigate potential security threats. By staying informed and proactive, users can protect their applications from exploitation.
See every vulnerability recorded for libjbcrypt-java →
FAQ
CVE-2015-0886 is a security vulnerability in the libjbcrypt-java library that allows attackers to exploit an integer overflow in password hashing.
If your application uses an affected version of libjbcrypt-java, attackers may be able to determine user passwords through brute-force attacks.
Versions prior to 0.4 are affected by this vulnerability. Users should upgrade to version 0.4-2 or later.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application's manifest file using the Vulert playground at Vulert Scanner.
Failing to address this vulnerability may lead to unauthorized access to user accounts, compromising sensitive information and overall application security.
Related vulnerabilities
Recent vulnerabilities recorded for libjbcrypt-java.
