Whitepaper Name Goes
Mentions the CVE; no further detail.
CVE-2021-23017 Public exploit EPSS 53.5%
A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from…
Summary
The flaw is an off-by-one error in the nginx resolver component, which handles DNS responses. An attacker who can forge UDP packets appearing to come from the DNS server can trigger a one-byte memory overwrite, crashing a worker process and potentially enabling other impact.
Official description · CVE.org
A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
28.7 / 100
- Exploited
- Not confirmed
- Reports
- 1
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Public exploit code (PoC-in-GitHub) appeared 7 months after disclosure. No confirmed exploitation is recorded.
- Disclosedday 0
- Public exploit codePoC-in-GitHub+7 mo
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Named in 1 threat report1 reportTrustwave
Reports are matched by finding the exact id CVE-2021-23017 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.