Vulnerability Details : CVE-2020-19861
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.
Products affected by CVE-2020-19861
- cpe:2.3:a:nlnetlabs:ldns:1.7.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-19861
0.34%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-19861
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-19861
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-19861
-
https://cwe.mitre.org/data/definitions/126.html
CWE - CWE-126: Buffer Over-read (4.8)Third Party Advisory
-
https://github.com/NLnetLabs/ldns/issues/51
Heap Out-of-bound Read vulnerability · Issue #51 · NLnetLabs/ldns · GitHubExploit;Issue Tracking;Third Party Advisory
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