—

GO-2022-1037

Unbounded memory consumption when reading headers in archive/tar

Details

Reader.Read does not set a limit on the maximum size of file headers. A maliciously crafted archive could cause Read to allocate unbounded amounts of memory, potentially causing resource exhaustion or panics. After fix, Reader.Read limits the maximum size of header blocks to 1 MiB.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go / stdlib

Introduced in: 0 Fixed in: 1.18.7

Fix go get stdlib@v1.18.7

References

https://go.dev/issue/54853 [REPORT]
https://go.dev/cl/439355 [FIX]
https://groups.google.com/g/golang-announce/c/xtuG5faxtaU [WEB]