CVE-2022-31003Public exploitNetwork attack vector

Remote process crash via malformed SDP parsing

Published May 31, 2022 · Updated Apr 22, 2025

Heap-based buffer overflow in Sofia-SIP before 1.13.8 allows remote attackers to crash a consuming FreeSWITCH process via malformed SDP. In parse_descs, a truncated final SDP line advances rest two bytes beyond its NUL terminator before passing that pointer to strspn, causing out-of-bounds access. The SIP endpoint must accept attacker-controlled SDP; the documented outcome is a crash, while the upstream advisory also identifies remote code execution as a more serious consequence.

CVSS severity9.1
Critical
EPSS probability3.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap-based buffer overflow in Sofia-SIP before 1.13.8 allows remote attackers to crash a consuming FreeSWITCH process via malformed SDP. In parse_descs, a truncated final SDP line advances rest two bytes beyond its NUL terminator before passing that pointer to strspn, causing out-of-bounds access. The SIP endpoint must accept attacker-controlled SDP; the documented outcome is a crash, while the upstream advisory also identifies remote code execution as a more serious consequence.

The record

CVE
CVE-2022-31003
Published
May 31, 2022
Updated
Apr 22, 2025
Vendor
FreeSWITCH
Product
Sofia-SIP
Classifications
CWE-122, CWE-787, T1190, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.13.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeSWITCH · Sofia-SIPversion=< 1.13.8

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo