CVE-2023-31470
CVE-2023-31470 is a critical-severity vulnerability in Pymumu Smartdns with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (62nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Pymumu Smartdns
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2023-31470?
- CVE-2023-31470 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-31470 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-31470?
- CVE-2023-31470 affects Pymumu Smartdns. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-31470?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2023-31470 published?
- CVE-2023-31470 was published on 2023-04-28 and last updated on 2026-06-17.
References
- https://github.com/pymumu/smartdns/commit/56d0332bf91104cfc877635f6c82e9348587df04
- https://github.com/pymumu/smartdns/issues/1378
Affected products (1)
- cpe:2.3:a:pymumu:smartdns:*:*:*:*:*:*:*:*
More vulnerabilities in Pymumu Smartdns
- CVE-2024-24199 — High (CVSS 7.5): smartdns commit 54b4dc was discovered to contain a misaligned address at smartdns/src/dns.c.
- CVE-2024-24198 — High (CVSS 7.5): smartdns commit 54b4dc was discovered to contain a misaligned address at smartdns/src/util.c.
All CVEs affecting Pymumu Smartdns →
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