CVE-2020-28851 Denial of service in n/a
An attacker can cause a denial of service by sending a crafted Accept-Language header that triggers a panic in the Go x/text library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-28851?
CVE-2020-28851 is a high-severity denial of service vulnerability in Golang Go, published on 2 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In x/text in Go 1.15.4, an "index out of range" panic occurs in language.ParseAcceptLanguage while parsing the -u- extension. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)
Weakness: CWE-129
Which versions are affected by CVE-2020-28851?
1 open source package ship an affected version, including golang. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | From 1.15.4 | 1.15.5 |
Products include Golang Go.
How do I fix CVE-2020-28851?
Upgrade golang to 1.15.5 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-2020-28851 being exploited?
There is no known exploitation of CVE-2020-28851 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
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- CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile
- CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
- CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go
- CVE-2023-24540 Improper handling of JavaScript whitespace in html/template
Sources
Also known as AZL-41422, AZL-45033, BIT-golang-2020-28851, DEBIAN-CVE-2020-28851, GHSA-739f-9qhv-6594, UBUNTU-CVE-2020-28851.