CVE-2023-29091Public exploitNetwork attack vector

Service interruption via SIP URI stack overflow

Published Apr 14, 2023 · Updated Feb 6, 2025

Stack buffer overflow in six Samsung Exynos processors and modems allows remote attackers to interrupt service via a crafted SIP URI. In IMSPL_SipUri.c, reversed colon and semicolon positions make an unsigned length reach 254 bytes while the signed bounds check sees a negative value, so strncpy overflows a 31-character stack buffer. An unauthenticated SIP reginfo message reaches the decoder without user interaction; published assessments limit demonstrated impact to availability.

CVSS severity6.8
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in six Samsung Exynos processors and modems allows remote attackers to interrupt service via a crafted SIP URI. In IMSPL_SipUri.c, reversed colon and semicolon positions make an unsigned length reach 254 bytes while the signed bounds check sees a negative value, so strncpy overflows a 31-character stack buffer. An unauthenticated SIP reginfo message reaches the decoder without user interaction; published assessments limit demonstrated impact to availability.

The record

CVE
CVE-2023-29091
Published
Apr 14, 2023
Updated
Feb 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1173, CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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

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-1173Improper Use of Validation Framework
CWE-787Out-of-bounds Write
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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