CVE-2021-23253 : Security Advisory and Response

Opera Mini for Android below version 53.1 is vulnerable to address bar spoofing, allowing attackers to craft malicious URLs. This vulnerability was identified in CVE-2021-23253.

Understanding CVE-2021-23253

This CVE affects Opera Mini for Android versions below 53.1 and poses a risk of address bar spoofing, enabling attackers to deceive users with crafted URLs.

What is CVE-2021-23253?

Opera Mini for Android below version 53.1 displays URLs left-aligned in the address field, allowing malicious attackers to create URLs with long domain names. This issue can lead to user deception as only part of the URL is visible.

The Impact of CVE-2021-23253

The vulnerability enables attackers to display misleading URLs to users, increasing the risk of phishing attacks and social engineering.

Technical Details of CVE-2021-23253

Opera Mini for Android versions below 53.1 are susceptible to address bar spoofing due to the incorrect alignment of URLs in the address field.

Vulnerability Description

The vulnerability allows attackers to craft URLs with long domain names, deceiving users with only partially visible URLs, potentially leading to malicious activities.

Affected Systems and Versions

Product: Opera Mini for Android
Vendor: n/a
Versions Affected: Below 53.1

Exploitation Mechanism

Attackers can exploit this vulnerability by creating URLs with long domain names that appear differently in the address bar, potentially tricking users into visiting malicious sites.

Mitigation and Prevention

To address CVE-2021-23253 and prevent address bar spoofing attacks, users and organizations are advised to take the following measures:

Immediate Steps to Take

Update Opera Mini for Android to version 53.1 or higher to mitigate the address bar spoofing issue.
Exercise caution while browsing the internet, especially when URLs appear suspicious or deceptive.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities and enhance security.
Educate users about the risks of phishing and social engineering attacks to promote safe browsing habits.

Patching and Updates

Stay informed about security advisories from Opera to promptly apply patches and updates that address vulnerabilities like address bar spoofing in Opera Mini for Android.