CVE-2018-17847 golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer

What is CVE-2018-17847?

CVE-2018-17847 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 1 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a "panic: runtime error" (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.

Weakness: CWE-119

Which versions are affected by CVE-2018-17847?

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

Products include Fedoraproject Fedora, Golang Net.

How do I fix CVE-2018-17847?

Upgrade golang.org/x/net to 0.0.0-20190125002852-4b62a64f59f7 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-2018-17847 being exploited?

There is no known exploitation of CVE-2018-17847 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 GHSA-4r78-hx75-jjj2.