CVE-2022-32148 Exposure of client IP addresses in net/http
Attackers can expose client IP addresses via ReverseProxy when handling nil X-Forwarded-For headers in Go's net/http 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-2022-32148?
CVE-2022-32148 is a medium-severity vulnerability in Golang Go, published on 9 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper exposure of client IP addresses in net/http before Go 1.17.12 and Go 1.18.4 can be triggered by calling httputil.ReverseProxy.ServeHTTP with a Request.Header map containing a nil value for the X-Forwarded-For header, which causes ReverseProxy to set the client IP as the value of the X-Forwarded-For header.
Which versions are affected by CVE-2022-32148?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.17.12, 1.18.4 |
stdlib Go | All versions | 1.17.12, 1.18.4 |
Products include Golang Go.
How do I fix CVE-2022-32148?
Upgrade golang to a fixed version for your release line: 1.17.12 or 1.18.4.
Is CVE-2022-32148 being exploited?
There is no known exploitation of CVE-2022-32148 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-10538, AZL-79054, AZL-98913, BIT-golang-2022-32148, DEBIAN-CVE-2022-32148, GHSA-f839-v4x8-wvr3 and 4 more.