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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2020-19860)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Ubuntu 20.04 ESM / 22.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5257-2 advisory.

    USN-5257-1 fixed several vulnerabilities in ldns. This update provides the corresponding update for Ubuntu     20.04 ESM and Ubuntu 22.04 ESM.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of ldns installed on the remote host is prior to 1.6.16-10. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2032 advisory.

    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. (CVE-2020-19860)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the ldns package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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. (CVE-2020-19860)

  - 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. (CVE-2020-19861)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the ldns package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - 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. (CVE-2020-19860)

  - 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. (CVE-2020-19861)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0675-1 advisory.

  - 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. (CVE-2020-19860)

  - 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. (CVE-2020-19861)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2022:0675-1 advisory.

  - 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. (CVE-2020-19860)

  - 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. (CVE-2020-19861)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 ESM / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5257-1 advisory.

    It was discovered that ldns incorrectly handled certain inputs. An attacker could possibly use this issue     to expose sensitive information. (CVE-2020-19860, CVE-2020-19861)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
223456	Linux Distros Unpatched Vulnerability : CVE-2020-19860	Nessus	Misc.	medium
183720	Ubuntu 20.04 ESM / 22.04 ESM : ldns vulnerabilities (USN-5257-2)	Nessus	Ubuntu Local Security Checks	high
175022	Amazon Linux 2 : ldns (ALAS-2023-2032)	Nessus	Amazon Linux Local Security Checks	medium
170789	EulerOS Virtualization 3.0.2.2 : ldns (EulerOS-SA-2023-1265)	Nessus	Huawei Local Security Checks	high
169589	EulerOS Virtualization 3.0.2.6 : ldns (EulerOS-SA-2023-1073)	Nessus	Huawei Local Security Checks	high
165883	EulerOS Virtualization 3.0.6.6 : ldns (EulerOS-SA-2022-2510)	Nessus	Huawei Local Security Checks	high
161530	EulerOS 2.0 SP3 : ldns (EulerOS-SA-2022-1737)	Nessus	Huawei Local Security Checks	high
160710	EulerOS Virtualization 3.0.2.0 : ldns (EulerOS-SA-2022-1700)	Nessus	Huawei Local Security Checks	high
160112	EulerOS 2.0 SP5 : ldns (EulerOS-SA-2022-1538)	Nessus	Huawei Local Security Checks	high
158581	SUSE SLED15 / SLES15 Security Update : ldns (SUSE-SU-2022:0675-1)	Nessus	SuSE Local Security Checks	high
158578	openSUSE 15 Security Update : ldns (openSUSE-SU-2022:0675-1)	Nessus	SuSE Local Security Checks	high
157243	Ubuntu 16.04 ESM / 18.04 LTS : ldns vulnerabilities (USN-5257-1)	Nessus	Ubuntu Local Security Checks	high

Detections

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CVE-2020-19860

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