CVE-2019-25006
📋 TL;DR
The streebog crate before version 0.8.0 for Rust contains an implementation flaw in the Streebog hash function that can produce incorrect hash values. This affects any Rust application using this crate for cryptographic hashing, potentially leading to data integrity issues, authentication bypass, or digital signature verification failures.
💻 Affected Systems
- streebog Rust crate
📦 What is this software?
Streebog by Streebog Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could forge digital signatures, bypass authentication systems, or tamper with data integrity checks by generating malicious inputs that produce the same hash as legitimate data.
Likely Case
Applications relying on Streebog hashes for data integrity verification or authentication could accept invalid data or unauthorized access due to hash collisions.
If Mitigated
With proper input validation and additional security controls, the impact is limited to specific cryptographic operations using the flawed implementation.
🎯 Exploit Status
Exploitation requires understanding of hash function vulnerabilities and ability to craft specific inputs. No public exploit code has been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.8.0 and later
Vendor Advisory: https://rustsec.org/advisories/RUSTSEC-2019-0030.html
Restart Required: Yes
Instructions:
1. Update Cargo.toml to specify streebog >= 0.8.0
2. Run 'cargo update' to fetch the patched version
3. Rebuild and redeploy your application
4. Test cryptographic functionality to ensure proper operation
🔧 Temporary Workarounds
Temporary version pinning
allPin the streebog dependency to version 0.8.0 or later in Cargo.toml
streebog = "^0.8.0"
🧯 If You Can't Patch
- Implement additional integrity checks beyond hash verification
- Use alternative cryptographic libraries for critical operations
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock or run 'cargo tree | grep streebog' to see the installed versionCheck Version:
grep streebog Cargo.lock | head -1Verify Fix Applied:
Verify streebog version is 0.8.0 or higher in Cargo.lock and test hash functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected hash validation failures
- Cryptographic operation errors
Network Indicators:
- None specific to this vulnerability
SIEM Query:
Search for application logs containing 'streebog' and version information below 0.8.0