OpenSUSE Linux update for pdns-recursor



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-3806
CVE-2019-3807
CWE-ID CWE-264
Exploitation vector Network
Public exploit N/A
Vulnerable software
 PowerDNS Recursor
Server applications / DNS servers

Vendor PowerDNS.COM B.V.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU17347

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-3806

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to Lua hooks are not properly applied to queries received over TCP in some specific combination of settings. A remote attacker can bypass security policies enforced using Lua.

Mitigation

Update the affected packages.

Vulnerable software versions

PowerDNS Recursor: 4.1.4 - 4.1.8

CPE2.3 External links

https://lists.opensuse.org/opensuse-security-announce/2019-02/msg00002.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Security restrictions bypass

EUVDB-ID: #VU17348

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-3807

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated. A remote attacker can bypass DNSSEC validation.

Mitigation

Update the affected packages.

Vulnerable software versions

PowerDNS Recursor: 4.1.0 - 4.1.8

CPE2.3 External links

https://lists.opensuse.org/opensuse-security-announce/2019-02/msg00002.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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