Summary
A vulnerability in Google Bard allowed for prompt injection and data exfiltration through its Extensions feature. By injecting malicious instructions into shared Google Docs, an attacker could force Bard to render images with exfiltrated chat history data in the URL. The exploit bypassed Content Security Policy using Google Apps Script.
Affected Services
Google Bard
Remediation
None required
Tracked CVEs
No tracked CVEs
References
Contributed by https://github.com/korniko98
Entry Status
Stub (AI-Generated)
Disclosure Date
Tue, Sep 19th, 2023
Exploitablity Period
Until 2023/10/19
Known ITW Exploitation
-
Detection Methods
Monitor for unexpected image rendering in Google Bard conversations and unusual data access patterns in Google Docs and Gmail linked to Bard.
Piercing Index Rating
-
Discovered by
wunderwuzzi, Embrace The Red
