How severe is CVE-2022-47517?

CVE-2022-47517 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-47517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-47517?

CVE-2022-47517 affects Drachtio Drachtio-server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-47517?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-47517 published?

CVE-2022-47517 was published on 2022-12-18 and last updated on 2026-06-17.

CVE-2022-47517

CVE-2022-47517 is a high-severity vulnerability in Drachtio Drachtio-server with a CVSS 3.x base score of 7.5. 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-193.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-193
Affected product: Drachtio Drachtio-server
Published: 2022-12-18
Last modified: 2026-06-17

Description

An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.19. It allows remote attackers to cause a denial of service (daemon crash) via a crafted UDP message that causes a url_canonize2 heap-based buffer over-read because of an off-by-one error.

Frequently asked questions

What is CVE-2022-47517?: An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.19. It allows remote attackers to cause a denial of service (daemon crash) via a crafted UDP message that causes a url_canonize2 heap-based buffer over-read because of an off-by-one error.
How severe is CVE-2022-47517?: CVE-2022-47517 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-47517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-47517?: CVE-2022-47517 affects Drachtio Drachtio-server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-47517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-47517 published?: CVE-2022-47517 was published on 2022-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:drachtio:drachtio-server:*:*:*:*:*:*:*:*

More vulnerabilities in Drachtio Drachtio-server

CVE-2022-45474 — Critical (CVSS 9.8): drachtio-server 0.8.18 has a request-handler.cpp event_cb use-after-free for any request.
CVE-2022-45909 — Critical (CVSS 9.1): drachtio-server before 0.8.19 has a heap-based buffer over-read via a long Request-URI in an INVITE request.
CVE-2022-47516 — High (CVSS 7.5): An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.20. It allows remote attackers to cause…
CVE-2022-47515 — High (CVSS 7.5): An issue was discovered in drachtio-server before 0.8.20. It allows remote attackers to cause a denial of service…
CVE-2022-45473 — Medium (CVSS 5.5): In drachtio-server 0.8.18, /var/log/drachtio has mode 0777 and drachtio.log has mode 0666.

All CVEs affecting Drachtio Drachtio-server →

Other CWE-193 (Off-by-one Error) vulnerabilities

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CVE-2024-38441 — Critical (CVSS 9.8): Netatalk before 3.2.1 has an off-by-one error and resultant heap-based buffer overflow because of setting ibuf[len] to…
CVE-2023-46853 — Critical (CVSS 9.8): In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used…
CVE-2023-38429 — Critical (CVSS 9.8): An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/connection.c in ksmbd has an off-by-one error in…
CVE-2022-34970 — Critical (CVSS 9.8): Crow before 1.0+4 has a heap-based buffer overflow via the function qs_parse in query_string.h. On successful…

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