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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.023 (82.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Oracle Communications Cloud Native Core Network Function Environment — versions 1.9.0
- Thekelleys Dnsmasq
- Fedoraproject Fedora — versions 32, 33, 34
- Red Hat Enterprise Linux — versions 8.0
- Dnsmasq — versions dnsmasq 2.85
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Exploit, Patch, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202105-20 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
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.