ldns: When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtai...
CVE-2020-19861 is fixed in 6 products on 1 platform, first by ldnsutils 1.7.0-3ubuntu4.1, released January 21, 2022. It is not reported as exploited. Patch Radar priority: High.
When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ldns · Debian 12.15 (bookworm) | 1.8.1-1 | DEBIAN-CVE-2020-19861 | Jan 21, 2022 |
| ldns · Debian 13.5 (trixie) | 1.8.1-1 | DEBIAN-CVE-2020-19861 | Jan 21, 2022 |
| ldns · Debian 14 | 1.8.1-1 | DEBIAN-CVE-2020-19861 | Jan 21, 2022 |
| ldnsutils · Ubuntu 18.04.6 LTS (bionic) | 1.7.0-3ubuntu4.1 | ldnsutils 1.7.0-3ubuntu4.1 | Jan 21, 2022 |
| ldnsutils · Ubuntu 20.04 LTS (focal) | 1.7.0-4.1ubuntu1+esm1 | ldnsutils 1.7.0-4.1ubuntu1+esm1 | Jan 21, 2022 |
| ldnsutils · Ubuntu 22.04.1 LTS (jammy) | 1.7.1-2ubuntu4+esm1 | ldnsutils 1.7.1-2ubuntu4+esm1 | Jan 21, 2022 |
| libldns2 · Ubuntu 18.04.6 LTS (bionic) | 1.7.0-3ubuntu4.1 | libldns2 1.7.0-3ubuntu4.1 | Jan 21, 2022 |
| libldns2 · Ubuntu 20.04 LTS (focal) | 1.7.0-4.1ubuntu1+esm1 | libldns2 1.7.0-4.1ubuntu1+esm1 | Jan 21, 2022 |
| libldns3 · Ubuntu 22.04.1 LTS (jammy) | 1.7.1-2ubuntu4+esm1 | libldns3 1.7.1-2ubuntu4+esm1 | Jan 21, 2022 |
| python-ldns · Ubuntu 18.04.6 LTS (bionic) | 1.7.0-3ubuntu4.1 | python-ldns 1.7.0-3ubuntu4.1 | Jan 21, 2022 |
| python-ldns · Ubuntu 20.04 LTS (focal) | 1.7.0-4.1ubuntu1+esm1 | python-ldns 1.7.0-4.1ubuntu1+esm1 | Jan 21, 2022 |
| python3-ldns · Ubuntu 18.04.6 LTS (bionic) | 1.7.0-3ubuntu4.1 | python3-ldns 1.7.0-3ubuntu4.1 | Jan 21, 2022 |
| python3-ldns · Ubuntu 20.04 LTS (focal) | 1.7.0-4.1ubuntu1+esm1 | python3-ldns 1.7.0-4.1ubuntu1+esm1 | Jan 21, 2022 |
| python3-ldns · Ubuntu 22.04.1 LTS (jammy) | 1.7.1-2ubuntu4+esm1 | python3-ldns 1.7.1-2ubuntu4+esm1 | Jan 21, 2022 |
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