etcd's WAL `ReadAll` method vulnerable to an entry with large index causing panic

TRUNG BÌNH 6.5CVE-2020-15106 · CVE-2020-15112 · BIT-etcd-2020-15106 · Công bố 05/08/2020 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2020-15106 là lỗ hổng mức TRUNG BÌNH (CVSS 6.5) ảnh hưởng go.etcd.io/etcd, go.etcd.io/etcd/v3, etcd (etcd).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 1.3%, cao hơn 69.6% các lỗ hổng khác.
Cách xử lý: cập nhật lên 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4, 3.4.10, 3.3.23 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
go.etcd.io/etcd Go	`< 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4`	`0.5.0-alpha.5.0.20200423152442-f4b650b51dc4`
go.etcd.io/etcd/v3 Go	`≥ 3.4.0, < 3.4.10< 3.3.23`	`3.4.103.3.23`
etcd etcd	`≥ 3.4.0, < 3.4.10< 3.3.23`	`3.4.103.3.23`

Mô tả

Vulnerability type

Data Validation

Detail

In the ReadAll method in wal/wal.go, it is possible to have an entry index greater then the number of entries. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.

References

Find out more on this vulnerability in the security audit report

For more information

If you have any questions or comments about this advisory:

Contact the etcd security committee

Mô tả của NVD

In etcd before versions 3.3.23 and 3.4.10, a large slice causes panic in decodeRecord method. The size of a record is stored in the length field of a WAL file and no additional validation is done on this data. Therefore, it is possible to forge an extremely large frame size that can unintentionally panic at the expense of any RAFT participant trying to decode the WAL.