CVE-2021-0341 Square OkHttp can accept the wrong certificate
Improper certificate hostname verification in Android allows remote attackers to disclose information without user interaction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-0341?
CVE-2021-0341 is a high-severity vulnerability in Google Android, published on 10 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069
Weakness: CWE-295
Which versions are affected by CVE-2021-0341?
2 open source packages ship an affected version, including com.squareup.okhttp3:okhttp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
com.squareup.okhttp3:okhttp Maven | All versions | 4.9.2 |
com.squareup.okhttp3:okhttp Maven | All versions | 4.9.2 |
Products include Google Android.
How do I fix CVE-2021-0341?
Upgrade com.squareup.okhttp3:okhttp to 4.9.2 or later.
Is CVE-2021-0341 being exploited?
There is no known exploitation of CVE-2021-0341 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-171980069, ASB-A-171980069, CLEANSTART-2026-BP11951, CLEANSTART-2026-JK31874, CLEANSTART-2026-PY40890, CLEANSTART-2026-ZD25264 and 5 more.