Vulnerability Name:

CVE-2020-19861 (CCN-217930)

Assigned:2019-09-25
Published:2019-09-25
Updated:2022-10-05
Summary: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.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-125
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-19861

Source: MISC
Type: Third Party Advisory
https://cwe.mitre.org/data/definitions/126.html

Source: XF
Type: UNKNOWN
ldns-cve202019861-info-disc(217930)

Source: CCN
Type: ldns GIT Repository
Heap Out-of-bound Read vulnerability #51

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://github.com/NLnetLabs/ldns/issues/51

Vulnerable Configuration:Configuration 1:
  • cpe:/a:nlnetlabs:ldns:1.7.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:nlnetlabs:ldns:1.7.1:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:8052
    P
    		perl-DNS-LDNS-1.7.0-150000.4.8.1 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:7545
    P
    		ldns-devel-1.7.0-150000.4.8.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:3417
    P
    		zypper-1.13.51-21.26.4 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95047
    P
    		perl-DNS-LDNS-1.7.0-4.6.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2965
    P
    		ldns-devel-1.7.0-4.6.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94595
    P
    		ldns-devel-1.7.0-4.6.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:101645
    P
    		Security update for ldns (Moderate)
    2022-03-02
    oval:org.opensuse.security:def:119121
    P
    		Security update for ldns (Moderate)
    2022-03-02
    oval:org.opensuse.security:def:101853
    P
    		Security update for ldns (Moderate)
    2022-03-02
    oval:org.opensuse.security:def:953
    P
    		Security update for ldns (Moderate)
    2022-03-02
    oval:org.opensuse.security:def:1191
    P
    		Security update for ldns (Moderate)
    2022-03-02
    BACK
    nlnetlabs ldns 1.7.1
    nlnetlabs ldns 1.7.1 -