Vulnerability Details : CVE-2023-39533
go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.
Products affected by CVE-2023-39533
- cpe:2.3:a:libp2p:go-libp2p:*:*:*:*:*:go:*:*
- cpe:2.3:a:libp2p:go-libp2p:*:*:*:*:*:go:*:*
- cpe:2.3:a:libp2p:go-libp2p:0.29.0:*:*:*:*:go:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-39533
0.45%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-39533
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2023-39533
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-39533
-
https://github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f774d3b9aa92d
core/crypto: restrict RSA keys to <= 8192 bits (#2454) · libp2p/go-libp2p@e30fcf7 · GitHubPatch
-
https://github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-xjgg
libp2p nodes vulnerable to attack using large RSA keys · Advisory · libp2p/go-libp2p · GitHubPatch;Vendor Advisory
-
https://github.com/golang/go/issues/61460
crypto/tls: verifying certificate chains containing large RSA keys is slow [CVE-2023-29409] · Issue #61460 · golang/go · GitHubIssue Tracking;Not Applicable;Vendor Advisory
-
https://github.com/quic-go/quic-go/pull/4012
update qtls to restrict RSA keys in certificates to <= 8192 bits by marten-seemann · Pull Request #4012 · quic-go/quic-go · GitHubPatch;Third Party Advisory
-
https://github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cffd1f1d912fbb
core/crypto: restrict RSA keys to <= 8192 bits (#2454) · libp2p/go-libp2p@0cce607 · GitHubPatch
-
https://github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142db017
crypto/tls: restrict RSA keys in certificates to <= 8192 bits · golang/go@2350afd · GitHubNot Applicable;Patch
-
https://github.com/libp2p/go-libp2p/pull/2454
core/crypto: restrict RSA keys to <= 8192 bits by MarcoPolo · Pull Request #2454 · libp2p/go-libp2p · GitHubExploit;Patch;Vendor Advisory
-
https://github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d32b2816d3a00
core/crypto: restrict RSA keys to <= 8192 bits (#2454) · libp2p/go-libp2p@445be52 · GitHubPatch
Jump to