CVE-2020-28852 : Vulnerability Insights and Analysis

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag.

Understanding CVE-2020-28852

This CVE involves a vulnerability in the x/text package in Go.

What is CVE-2020-28852?

The issue arises in the language.ParseAcceptLanguage function when handling a BCP 47 tag, impacting the ability to parse an HTTP Accept-Language header.

The Impact of CVE-2020-28852

The vulnerability can lead to a "slice bounds out of range" panic, potentially causing denial of service or other security implications.

Technical Details of CVE-2020-28852

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in x/text in Go before v0.3.5 triggers a panic due to out-of-range slice bounds during BCP 47 tag processing.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The issue can be exploited by providing a crafted BCP 47 tag to trigger the panic in the language.ParseAcceptLanguage function.

Mitigation and Prevention

Protecting systems from CVE-2020-28852 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to version v0.3.5 or later of the x/text package in Go.
Monitor for any unusual activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Conduct security assessments and code reviews to identify and address similar issues.

Patching and Updates

Ensure timely application of patches and updates to all relevant software components to mitigate the risk of exploitation.