CVE-2021-45951 — Out-of-bounds Write in Dnsmasq

CWE-787 — Out-of-bounds Write16 documents5 sources
Severity
9.8CRITICALNVD
EPSS
0.0%
top 89.78%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Thekelleys Dnsmasq
Timeline
PublishedJan 1
Latest updateJan 2

Description

Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and FuzzCheckForBogusWildcard). 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

🔴Vulnerability Details

2
GHSA
GHSA-vwm2-rj6m-p924: Dnsmasq 2↗2022-01-02
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CVEList
CVE-2021-45951: Dnsmasq 2↗2021-12-31
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📋Vendor Advisories

13
Red Hat
dnsmasq: a heap-based buffer overflow in check_bad_address↗2022-01-01
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Red Hat
dnsmasq: heap-based buffer overflow in resize_packet↗2022-01-01
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Red Hat
dnsmasq: a heap-based buffer overflow in dhcp_reply↗2022-01-01
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Red Hat
dnsmasq: a heap-based buffer overflow in answer_request↗2022-01-01
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Red Hat
dnsmasq: a heap-based buffer overflow in print_mac↗2022-01-01
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CVE-2021-45951 — Out-of-bounds Write in Dnsmasq | cvebase