Debian update for pdns-recursor



Published: 2020-05-22
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-12244
CVE-2020-10995
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
pdns-recursor (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU28142

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-12244

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to records in the answer section of a NXDOMAIN response lacking an SOA are not properly validated in SyncRes::processAnswer. A remote attacker with ability to perform a Man-in-the-Middle (MitM) attack can send a NXDOMAIN answer for a name that does exist and bypass DNSSEC validation.

Successful exploitation of the vulnerability may allow an attacker to perform a spoofing attack.

Mitigation

Update pdns-recursor package to version 4.1.11-1+deb10u1.

Vulnerable software versions

pdns-recursor (Debian package): 3.0.1-1 - 4.3.0-2


CPE2.3 External links

http://www.debian.org/security/2020/dsa-4691

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Input validation error

EUVDB-ID: #VU28141

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-10995

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing DNS responses. A remote attacker who controls a malicious DNS server can send a specially crafted response and perform a denial of service (DoS) attack against third-party DNS servers.

The attack is triggered by random subdomains in the NSDNAME in NS records.

Mitigation

Update pdns-recursor package to version 4.1.11-1+deb10u1.

Vulnerable software versions

pdns-recursor (Debian package): 3.0.1-1 - 4.3.0-2


CPE2.3 External links

http://www.debian.org/security/2020/dsa-4691

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



###SIDEBAR###