GHSA-9gxq-wfg7-72x4

GHSA-9gxq-wfg7-72x4 PUBLISHED CVSS 3.700000047683716 LOW

Record from GitHub Advisory Database · Published May 24, 2022

A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in forward.c:reply_query(), which is the forwarded query that matches the reply, by only using a weak hash of the query name. Due to the weak hash (CRC32 when dnsmasq is compiled without DNSSEC, SHA-1 when it is) this flaw allows an off-path attacker to find several different domains all having the same hash, substantially reducing the number of attempts they would have to perform to forge a reply and get it accepted by dnsmasq. This is in contrast with RFC5452, which specifies that the query name is one of the attributes of a query that must be used to match a reply. This flaw could be abused to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25684 the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.

Risk scores

CVSS 3.1

3.700000047683716

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Timeline

May 24, 2022 CVE Published
Apr 29, 2026 Security Advisory
Apr 30, 2026 Distribution Patch

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln GHSA-9gxq-wfg7-72x4
vulnetix vdb fixes GHSA-9gxq-wfg7-72x4

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/GHSA-9gxq-wfg7-72x4/fixes/registry"

The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart

References

Look up in the Resolve Platform →