etcd: In etcd before versions 3.3.23 and 3.4.10, a large slice causes panic in decodeRecord method
CVE-2020-15106 is fixed in 4 products on 1 platform, first by etcd 3.2.17+dfsg-1ubuntu0.1~esm1, released August 6, 2020. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| etcd · Ubuntu 18.04.6 LTS (bionic) | 3.2.17+dfsg-1ubuntu0.1~esm1 | etcd 3.2.17+dfsg-1ubuntu0.1~esm1 | Aug 6, 2020 |
| etcd · Ubuntu 20.04 LTS (focal) | 3.2.26+dfsg-6ubuntu0.1 | etcd 3.2.26+dfsg-6ubuntu0.1 | Aug 6, 2020 |
| etcd · opensuse-leap 15.6 | 3.5.12-bp156.4.3.1 | OPENSUSE-SU-2025:0003-1 | Jan 7, 2025 |
| etcd-client · Ubuntu 18.04.6 LTS (bionic) | 3.2.17+dfsg-1ubuntu0.1~esm1 | etcd-client 3.2.17+dfsg-1ubuntu0.1~esm1 | Aug 6, 2020 |
| etcd-client · Ubuntu 20.04 LTS (focal) | 3.2.26+dfsg-6ubuntu0.1 | etcd-client 3.2.26+dfsg-6ubuntu0.1 | Aug 6, 2020 |
| etcd-server · Ubuntu 18.04.6 LTS (bionic) | 3.2.17+dfsg-1ubuntu0.1~esm1 | etcd-server 3.2.17+dfsg-1ubuntu0.1~esm1 | Aug 6, 2020 |
| etcd-server · Ubuntu 20.04 LTS (focal) | 3.2.26+dfsg-6ubuntu0.1 | etcd-server 3.2.26+dfsg-6ubuntu0.1 | Aug 6, 2020 |
| golang-etcd-server-dev · Ubuntu 18.04.6 LTS (bionic) | 3.2.17+dfsg-1ubuntu0.1~esm1 | golang-etcd-server-dev 3.2.17+dfsg-1ubuntu0.1~esm1 | Aug 6, 2020 |
| golang-etcd-server-dev · Ubuntu 20.04 LTS (focal) | 3.2.26+dfsg-6ubuntu0.1 | golang-etcd-server-dev 3.2.26+dfsg-6ubuntu0.1 | Aug 6, 2020 |
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