CVE-2020-14040 golang.org/x/text Infinite loop

What is CVE-2020-14040?

CVE-2020-14040 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 17 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The x/text package before 0.3.3 for Go has a vulnerability in encoding/unicode that could lead to the UTF-16 decoder entering an infinite loop, causing the program to crash or run out of memory. An attacker could provide a single byte to a UTF16 decoder instantiated with UseBOM or ExpectBOM to trigger an infinite loop if the String function on the Decoder is called, or the Decoder is passed to golang.org/x/text/transform.String.

Weakness: CWE-835

Which versions are affected by CVE-2020-14040?

3 open source packages ship an affected version, including golang.org/x/text. It affects 2 products.

Products include Fedoraproject Fedora, Golang Text.

How do I fix CVE-2020-14040?

Upgrade golang.org/x/text to 0.3.3 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-14040 being exploited?

There is no known exploitation of CVE-2020-14040 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-44364, AZL-44877, DEBIAN-CVE-2020-14040, GHSA-5rcv-m4m3-hfh7, GO-2020-0015, RHSA-2020:5054 and 2 more.