Weaknesses in the generation of TCP/UDP source ports and some other header values in Googles gVisor allowed them to be predicted by an external attacker in some circumstances.
Weakness
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gvisor | * | 20231030.0 (excluding) | |
| Gvisor | 20231106.0 (including) | 20231106.0 (including) | |
| Golang-gvisor-gvisor | Ubuntu | oracular | * |
| Golang-gvisor-gvisor | Ubuntu | plucky | * |
| Golang-inet-netstack | Ubuntu | oracular | * |
| Golang-inet-netstack | Ubuntu | plucky | * |
References
- https://github.com/google/gvisor/commit/5d2bf2546805afa09a6f6d9b23ec267823e32205
- https://github.com/google/gvisor/commit/83f75082e5b03fafca9201d9d9939028f712b0b2
- https://github.com/google/gvisor/commit/cbdb2c61b1f753834cedf2ebe68cbc335dadca52
- https://www.ndss-symposium.org/wp-content/uploads/2025-122-paper.pdf