CVE-2023-39322 Memory exhaustion in QUIC connection handling in crypto/tls
A malicious QUIC connection can cause unbounded memory growth in Go's crypto/tls library, leading to 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-2023-39322?
CVE-2023-39322 is a high-severity denial of service vulnerability in Golang Go, published on 8 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
QUIC connections do not set an upper bound on the amount of data buffered when reading post-handshake messages, allowing a malicious QUIC connection to cause unbounded memory growth. With fix, connections now consistently reject messages larger than 65KiB in size.
Weakness: CWE-770
Which versions are affected by CVE-2023-39322?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | From 1.21.0 | 1.21.1 |
stdlib Go | From 1.21.0-0 | 1.21.1 |
Products include Golang Go.
How do I fix CVE-2023-39322?
Upgrade golang to 1.21.1 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-2023-39322 being exploited?
There is no known exploitation of CVE-2023-39322 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 BELL-CVE-2023-39322, BIT-golang-2023-39322, GHSA-892h-r6cr-53g4, GO-2023-2045.