#VU72076 Incorrect authorization in Google API Client Library for Java - CVE-2020-7692
Published: February 8, 2023
Vulnerability identifier: #VU72076
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-7692
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Google API Client Library for Java
Google API Client Library for Java
Software vendor:
Google
Description
The vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to missing support for PKCE. Without the use of PKCE, the authorization code returned by an authorization server is not enough to guarantee that the client that issued the initial authorization request is the one that will be authorized. An attacker is able to obtain the authorization code using a malicious app on the client-side and use it to gain authorization to the protected resource.
Remediation
Install updates from vendor's website.
External links
- https://github.com/googleapis/google-oauth-java-client/commit/13433cd7dd06267fc261f0b1d4764f8e3432c824
- https://github.com/googleapis/google-oauth-java-client/issues/469
- https://tools.ietf.org/html/rfc8252%23section-8.1
- https://tools.ietf.org/html/rfc7636%23section-1
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEOAUTHCLIENT-575276
- https://lists.apache.org/thread.html/r3db6ac73e0558d64f0b664f2fa4ef0a865e57c5de20f8321d3b48678@%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/reae8909b264d1103f321b9ce1623c10c1ddc77dba9790247f2c0c90f@%3Ccommits.druid.apache.org%3E