What is CVE-2023-31470?

CVE-2023-31470 is a critical-severity vulnerability in Pymumu Smartdns, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-28.

How severe is CVE-2023-31470?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-31470 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Pymumu Smartdns

CVE-2023-31470

SmartDNS through 41 before 56d0332 allows an out-of-bounds write because of a stack-based buffer overflow in the _dns_encode_domain function in the dns.c file, via a crafted DNS request.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (62.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Pymumu Smartdns
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

DiRaltvein/memory-corruption-examples

References

cve@mitre.org (Exploit)
cve@mitre.org (Patch)

Frequently asked questions

What is CVE-2023-31470?: CVE-2023-31470 is a critical-severity vulnerability in Pymumu Smartdns, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-28.
How severe is CVE-2023-31470?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-31470 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.