CVE-2022-27536 Denial of service in n/a
A remote TLS server can cause a Go TLS client to panic on macOS by presenting malformed certificates, resulting in a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-27536?
CVE-2022-27536 is a high-severity denial of service vulnerability in Golang Go, published on 20 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Certificate.Verify in crypto/x509 in Go 1.18.x before 1.18.1 can be caused to panic on macOS when presented with certain malformed certificates. This allows a remote TLS server to cause a TLS client to panic.
Weakness: CWE-295
Which versions are affected by CVE-2022-27536?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | From 1.18.0 | 1.18.1 |
stdlib Go | From 1.18.0-0 | 1.18.1 |
Products include Golang Go.
How do I fix CVE-2022-27536?
Upgrade golang to 1.18.1 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-2022-27536 being exploited?
There is no known exploitation of CVE-2022-27536 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
- CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing
- 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-78958, AZL-98946, BIT-golang-2022-27536, GHSA-vwmq-9gjc-2jjj, GO-2022-0434.