Bug#1010657: google-oauth-client-java: CVE-2021-22573 - IdTokenVerifier does not verify the signature of ID Token

[Neil Williams]

Source: google-oauth-client-java
Version: 1.28.0-2
Severity: grave
Tags: security
Justification: user security hole
X-Debbugs-Cc: codehelp at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for google-oauth-client-java.

CVE-2021-22573[0]:
| The vulnerability is that IDToken verifier does not verify if token is
| properly signed. Signature verification makes sure that the token's
| payload comes from valid provider, not from someone else. An attacker
| can provide a compromised token with custom payload. The token will
| pass the validation on the client side. We recommend upgrading to
| version 1.33.3 or above


> The spec requires to validate the signature of ID token for apps that
> cannot guarantee TLS communication, which is the case for this library.
> This library initiates a local server that can run on any client machine
> without TLS support. So, it is critical to validate the signature, 
> before trusting the claims of an ID token, which can be received from 
> a malicious service provider.

Fixed in upstream release 1.33.3

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-22573
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22573

Please adjust the affected versions in the BTS as needed.



-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.17.0-1-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled