Description
A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache. This attack allows for a malicious GOPROXY to serve malicious module content that cannot be detected by evaluating the transparency log. All tiles are now correctly verified against their parents. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- golang.org/x/mod / golang.org/x/mod/sumdb/tlog0 – 0.40.0
- Go toolchain / cmd/go0 – 1.25.13
- Go toolchain / cmd/go1.26.0-0 – 1.26.6
- Go toolchain / cmd/go1.27.0-0 – 1.27.0-rc.3
Updated 38m ago · 8 sources