GHSA-fpg8-7664-jc5q
melange: Incomplete package integrity verification allows data section substitution
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | chainguard.dev/apko | < 1.2.9 | 1.2.9 |
| Go | chainguard.dev/melange | < 0.50.4 | 0.50.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
Previously, Apko verified the control section hash (`.PKGINFO` etc.) against the signed `APKINDEX`, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed.
References
External links from the advisory. They lead to third-party sites.