CVE-2022-31001Public exploitNetwork attack vector

Service crash via unchecked SIP method length

Published May 31, 2022 · Updated Aug 3, 2024

Out-of-bounds read in FreeSWITCH Sofia-SIP before 1.13.8 allows remote attackers to crash SIP applications with a crafted message. In sip_method_d, the MATCH macro leaves n at a candidate method length longer than the remaining input, and IS_NON_WS then reads s[n] past the buffer. Any network-reachable application that passes unauthenticated SIP messages to the affected parser can be interrupted; no confidentiality or integrity impact is reported.

CVSS severity7.5
High
EPSS probability2.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in FreeSWITCH Sofia-SIP before 1.13.8 allows remote attackers to crash SIP applications with a crafted message. In sip_method_d, the MATCH macro leaves n at a candidate method length longer than the remaining input, and IS_NON_WS then reads s[n] past the buffer. Any network-reachable application that passes unauthenticated SIP messages to the affected parser can be interrupted; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2022-31001
Published
May 31, 2022
Updated
Aug 3, 2024
Vendor
FreeSWITCH
Product
Sofia-SIP
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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

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Your stack

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