Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 3 |
CVE-ID | CVE-2020-24696 CVE-2020-24697 CVE-2020-24698 |
CWE-ID | CWE-362 CWE-20 CWE-415 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
PowerDNS Authoritative Server applications / DNS servers |
Vendor | PowerDNS.COM B.V. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
EUVDB-ID: #VU47124
Risk: Medium
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24696
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition when processing queries with a GSS-TSIG signature. A remote attacker can exploit the race and crash the server or execute arbitrary code on the system.
Successful exploitation of the vulnerability requires that the application is compiled with –enable-experimental-gss-tsig flag.
Install update from vendor's website.
Vulnerable software versionsPowerDNS Authoritative: 4.0.0 - 4.3.1
External linkshttp://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2020-06.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.
EUVDB-ID: #VU47125
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24697
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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 pressing queries with a GSS-TSIG signature. A remote attacker can pass specially crafted DNS query to the application and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that the application is compiled with –enable-experimental-gss-tsig flag.
MitigationInstall update from vendor's website.
Vulnerable software versionsPowerDNS Authoritative: 4.0.0 - 4.3.1
External linkshttp://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2020-06.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.
EUVDB-ID: #VU47126
Risk: Medium
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24698
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing queries with a GSS-TSIG signature. A remote attacker can pass specially crafted DNS query to the application, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability requires that the application is compiled with –enable-experimental-gss-tsig flag.
MitigationInstall update from vendor's website.
Vulnerable software versionsPowerDNS Authoritative: 4.0.0 - 4.3.1
External linkshttp://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2020-06.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.