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Fencer Vulns
high 7.5

CVE-2022-47516 json

An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.20.

published 2022-12-18 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-50277

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.20. It allows remote attackers to cause a denial of service (daemon crash) via a crafted UDP message that leads to a failure of the libsofia-sip-ua/tport/tport.c self assertion.

Patch / fix

  • drachtio drachtio-server 0.8.20
  • sofia-sip Debian 14, Debian 13, Debian 12 1.12.11+20110422.1+1e14eea~dfsg-5

debian advisories DEBIAN-CVE-2022-47516

  • sofia-sip Ubuntu 18.04 LTS 1.12.11+20110422.1-2.1+deb10u3build0.18.04.1
  • sofia-sip Ubuntu 20.04 LTS 1.12.11+20110422.1-2.1+deb10u3ubuntu0.20.04.1
  • sofia-sip Ubuntu 22.04 LTS 1.12.11+20110422.1-2.1+deb10u3ubuntu0.22.04.1
  • sofia-sip Ubuntu Pro 16.04 LTS 1.12.11+20110422.1-2.1+deb10u3ubuntu0.16.04.1~esm1

ubuntu advisories UBUNTU-CVE-2022-47516

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-47516 updated cvss 7.5

sofia-sip: remote DoS via crafted UDP message

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

1.76% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/drachtio/drachtio-server/issues/244 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.