Vulnerability in Oracle Communications Cloud Native Core Network Function Environment
CVE-2021-3448
A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest threat from this vulnerability is to data integrity.
EPSS: 0.020 (78.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.
Affected products
- Oracle Communications_cloud_native_core_network_function_cloud_native_environment — versions 1.9.0
- Thekelleys Dnsmasq
- Fedoraproject Fedora — versions 32, 33, 34
- Redhat Enterprise_linux — versions 8.0
- N/a Dnsmasq — versions dnsmasq 2.85
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-3448?
- CVE-2021-3448 is a medium-severity vulnerability in Oracle Communications Cloud Native Core Network Function Environment, classified under CWE-358. CVSS score: 4.0/10. Published 2021-04-08.
- How severe is CVE-2021-3448?
- Medium severity. CVSS v3 base score is 4.0 out of 10.
- Is CVE-2021-3448 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.