Vulnerability Details : CVE-2021-45956
** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called from log_packet and dhcp_reply). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge."
Vulnerability category: OverflowMemory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2021-45956
Probability of exploitation activity in the next 30 days: 0.14%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 50 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-45956
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
[email protected] |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
[email protected] |
CWE ids for CVE-2021-45956
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: [email protected] (Primary)
References for CVE-2021-45956
-
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35887
Exploit;Issue Tracking;Third Party Advisory
-
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-933.yaml
Third Party Advisory
-
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html
Mailing List;Third Party Advisory
-
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html
Mailing List;Third Party Advisory
Products affected by CVE-2021-45956
- cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*