CVE-2020-19861
Publication date 21 January 2022
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
ldns | 24.04 LTS noble |
Not affected
|
22.04 LTS jammy |
Fixed 1.7.1-2ubuntu4+esm1
|
|
20.04 LTS focal |
Fixed 1.7.0-4.1ubuntu1+esm1
|
|
18.04 LTS bionic |
Fixed 1.7.0-3ubuntu4.1
|
|
16.04 LTS xenial |
Fixed 1.6.17-8ubuntu0.1+esm1
|
|
14.04 LTS trusty | Ignored end of standard support |
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Get Ubuntu ProSeverity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 · High |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-5257-1
- ldns vulnerabilities
- 31 January 2022
- USN-5257-2
- ldns vulnerabilities
- 4 October 2022