GHSA-cjjc-xp8v-855w BIT-golang-2020-7919 CVE-2020-7919 GO-2022-0229
Helm uses crypto package vulnerable to panic from malformed X.509 certificate
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 2.65%
- Chance of exploitation in the next 30 days. Higher than 85.61% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-295 Improper Certificate Validation
- Fix
- Available
- 4 packages have a fixed version
Description
The Helm core maintainers have identified a high severity security vulnerability in Go's crypto package affecting all versions prior to Helm 2.16.8 and Helm 3.1.0.
Thanks to @ravin9249 for identifying the vulnerability.
Impact
Go before 1.12.16 and 1.13.x before 1.13.7 (and the crypto/cryptobyte package before 0.0.0-20200124225646-8b5121be2f68 for Go) allows attacks on clients resulting in a panic via a malformed X.509 certificate. This may allow a remote attacker to cause a denial of service.
Patches
A patch to compile Helm against Go 1.14.4 has been provided for Helm 2 and is available in Helm 2.16.8. Helm 3.1.0 and newer are compiled against Go 1.13.7+.
Workarounds
No workaround is available. Users are urged to upgrade.
References
For more information
If you have any questions or comments about this advisory:
- Open an issue in the Helm repository
- For security-specific issues, email us at cncf-helm-security@lists.cncf.io
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/helm/helm | >= 2.0.0, < 2.16.8 |
2.16.8 |
| golang.org/x/crypto | < 0.0.0-20200124225646-8b5121be2f68 |
0.0.0-20200124225646-8b5121be2f68 |
| helm.sh/helm/v3 | >= 3.0.0, < 3.1.0 |
3.1.0 |
| stdlib | < 1.12.16>= 1.13.0-0, < 1.13.7 |
1.12.161.13.7 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
github.com/helm/helm Go → 2.16.8
- go
go get github.com/helm/helm@v2.16.8 && go mod tidy
golang.org/x/crypto Go → 0.0.0-20200124225646-8b5121be2f68
- go
go get golang.org/x/crypto@v0.0.0-20200124225646-8b5121be2f68 && go mod tidy
helm.sh/helm/v3 Go → 3.1.0
- go
go get helm.sh/helm/v3@v3.1.0 && go mod tidy
stdlib Go → 1.13.7
- go
go get stdlib@v1.13.7 && go mod tidy
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Weakness
CWE-295: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How to prevent it
- Architecture and Design, Implementation: Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- Implementation: If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
References
Advisories
Packages
Other links
- github.com/helm/helm/security/advisories/GHSA-cjjc-xp8v-855w
- go.dev/cl/216677
- go.dev/cl/216680
- go.dev/issue/36837
- go.googlesource.com/go/+/b13ce14c4a6aa59b7b041ad2b6eed2d23e15b574
- groups.google.com/forum
- groups.google.com/forum
- groups.google.com/forum
- groups.google.com/g/golang-announce/c/Hsw4mHYc470
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S43VL…
- pkg.go.dev/vuln/GO-2022-0229
- security.netapp.com/advisory/ntap-20200327-0001
- debian.org/security/2021/dsa-4848
- oracle.com/security-alerts/cpuApr2021.html
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-4374-p667-p6c8 HTTP/2 rapid reset can cause excessive work in net/http | High Known exploited | Also affects stdlib |
| CVE-2020-0601 Certificate validation bypass on Windows in crypto/x509 | High Known exploited | Also affects stdlib |
| RUSTSEC-2026-0382 Distrust compromised intermediate certificates in crypto/x509 | Medium | Also affects stdlib |
| GO-2026-6613 HTTP/1 server connection desynchronization after 2xx CONNECT response in net/http | High | Also affects stdlib |
| GO-2026-6609 Lack of limit on size of parsed Range headers in net/http | High | Also affects stdlib |
| GO-2026-6608 Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart | High | Also affects stdlib |
| GO-2026-6607 Reject malformed ECH outer extension references in crypto/tls | High | Also affects stdlib |
| GO-2026-6604 Root.Mkdir(All) can follow junctions out of the root on Windows in os | Critical | Also affects stdlib |
Credits: Project Wycheproof
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