CVE-2020-10256
📋 TL;DR
This vulnerability affects beta versions of 1Password's command-line tool and SCIM bridge, where an insecure random number generator was used to create encryption keys. Attackers with access to encrypted data could brute-force these keys to decrypt sensitive information. Users of affected beta versions are at risk.
💻 Affected Systems
- 1Password command-line tool
- 1Password SCIM bridge
📦 What is this software?
Scim by 1password
⚠️ Risk & Real-World Impact
Worst Case
Complete decryption of all encrypted 1Password data, exposing passwords, secure notes, and other sensitive credentials stored in affected systems.
Likely Case
Targeted decryption of specific encrypted data by attackers who have already gained access to the encrypted files or network traffic.
If Mitigated
Minimal impact if systems are patched before attackers gain access to encrypted data.
🎯 Exploit Status
Exploitation requires prior access to encrypted data and significant computational resources for brute-force attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Command-line tool: 0.5.5 or later; SCIM bridge: 0.7.3 or later
Vendor Advisory: https://support.1password.com/kb/202010/
Restart Required: Yes
Instructions:
1. Update 1Password command-line tool to version 0.5.5 or later. 2. Update 1Password SCIM bridge to version 0.7.3 or later. 3. Restart affected services after updating.
🔧 Temporary Workarounds
Disable affected beta software
allRemove or disable vulnerable beta versions of 1Password command-line tool and SCIM bridge until patched.
sudo systemctl stop 1password-scim
sudo apt remove 1password-cli-beta
🧯 If You Can't Patch
- Migrate to stable releases of 1Password software instead of beta versions.
- Isolate systems running vulnerable versions from network access and monitor for unauthorized data access.
🔍 How to Verify
Check if Vulnerable:
Check version of installed 1Password command-line tool and SCIM bridge: 'op --version' and review SCIM bridge version in configuration.Check Version:
op --versionVerify Fix Applied:
Confirm versions: command-line tool should be 0.5.5+, SCIM bridge should be 0.7.3+.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to encrypted 1Password data files
- Failed decryption attempts in logs
Network Indicators:
- Suspicious outbound connections from systems running vulnerable versions
SIEM Query:
source="1password" AND (version="0.5.*" OR version="0.7.*") AND version<"0.5.5" OR version<"0.7.3"