Out-of-bounds Read in Nlnetlabs Ldns
CVE-2020-19860
When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Nlnetlabs Ldns — versions 1.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/NLnetLabs/ldns/issues/50 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-19860?
- CVE-2020-19860 is a medium-severity vulnerability in Nlnetlabs Ldns, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2022-01-21.
- How severe is CVE-2020-19860?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-19860 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.