Red Hat Enterprise Linux 7 update for dnsmasq
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 |
| CWE-ID | CWE-345 CWE-327 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux for Power, little endian Operating systems & Components / Operating system Red Hat Enterprise Linux for Power, big endian Operating systems & Components / Operating system Red Hat Enterprise Linux for IBM z Systems Operating systems & Components / Operating system Red Hat Enterprise Linux for Scientific Computing Operating systems & Components / Operating system Red Hat Enterprise Linux Desktop Operating systems & Components / Operating system Red Hat Enterprise Linux Workstation Operating systems & Components / Operating system Red Hat Enterprise Linux Server Operating systems & Components / Operating system dnsmasq (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Insufficient verification of data authenticity
EUVDB-ID: #VU49843
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25684
CWE-ID:
CWE-345 - Insufficient Verification of Data Authenticity
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a lack of proper address/port check within the "reply_query" function. A remote attacker can perform a DNS cache poisoning attack.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Power, little endian: 7
Red Hat Enterprise Linux for Power, big endian: 7
Red Hat Enterprise Linux for IBM z Systems: 7
Red Hat Enterprise Linux for Scientific Computing: 7
Red Hat Enterprise Linux Desktop: 7
Red Hat Enterprise Linux Workstation: 7
Red Hat Enterprise Linux Server: 7
dnsmasq (Red Hat package): before 2.76-16.el7_9.1
External linkshttp://access.redhat.com/errata/RHSA-2021:0153
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU49844
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25685
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a lack of query resource name (RRNAME) checks in the "reply_query" function. A remote attacker can perform a DNS cache poisoning attack.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Power, little endian: 7
Red Hat Enterprise Linux for Power, big endian: 7
Red Hat Enterprise Linux for IBM z Systems: 7
Red Hat Enterprise Linux for Scientific Computing: 7
Red Hat Enterprise Linux Desktop: 7
Red Hat Enterprise Linux Workstation: 7
Red Hat Enterprise Linux Server: 7
dnsmasq (Red Hat package): before 2.76-16.el7_9.1
External linkshttp://access.redhat.com/errata/RHSA-2021:0153
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Insufficient verification of data authenticity
EUVDB-ID: #VU49845
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-25686
CWE-ID:
CWE-345 - Insufficient Verification of Data Authenticity
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the affected software does not check for an existing pending request for the same name and forwards a new request. A remote attacker can perform a DNS cache poisoning attack.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Power, little endian: 7
Red Hat Enterprise Linux for Power, big endian: 7
Red Hat Enterprise Linux for IBM z Systems: 7
Red Hat Enterprise Linux for Scientific Computing: 7
Red Hat Enterprise Linux Desktop: 7
Red Hat Enterprise Linux Workstation: 7
Red Hat Enterprise Linux Server: 7
dnsmasq (Red Hat package): before 2.76-16.el7_9.1
External linkshttp://access.redhat.com/errata/RHSA-2021:0153
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
