CVE-2024-24786 — Infinite loop in JSON unmarshaling in google.golang.org/protobuf

Affected: google.golang.org/protobuf/encoding/protojson, google.golang.org/protobuf/internal/encoding/json

The protojson.Unmarshal function can enter an infinite loop when unmarshaling certain forms of invalid JSON. This condition can occur when unmarshaling into a message which contains a google.protobuf.Any value, or when the UnmarshalOptions.DiscardUnknown option is set.

GHSA-8rm2-7qqf-34qm — Prometheus: Remote read endpoint allows denial of service via crafted snappy payload

Affected: Go: github.com/prometheus/prometheus

### Impact

The remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.

### Patches _Has the problem been patched? What versions should users upgrade to?_

Fixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.

### Workarounds User who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.

Most recent entries from all

CVE-2024-24786 — Infinite loop in JSON unmarshaling in google.golang.org/protobuf

GHSA-8rm2-7qqf-34qm — Prometheus: Remote read endpoint allows denial of service via crafted snappy payload