CVE-2023-29087Public exploitNetwork attack vector

Modem service interruption via SIP heap overflow

Published Apr 14, 2023 · Updated Feb 7, 2025

Heap buffer overflow in Samsung Exynos baseband processors allows remote attackers to interrupt modem service with a crafted SIP Retry-After header. The SIP decoder insufficiently validates the Retry-After parameter before writing parsed data beyond its heap buffer in IMSPL_SipRetryAfter.c. Exploitation requires no authentication or user interaction but has high attack complexity; published impact is limited to service interruption.

CVSS severity6.8
Medium
EPSS probability0.79%
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 buffer overflow in Samsung Exynos baseband processors allows remote attackers to interrupt modem service with a crafted SIP Retry-After header. The SIP decoder insufficiently validates the Retry-After parameter before writing parsed data beyond its heap buffer in IMSPL_SipRetryAfter.c. Exploitation requires no authentication or user interaction but has high attack complexity; published impact is limited to service interruption.

The record

CVE
CVE-2023-29087
Published
Apr 14, 2023
Updated
Feb 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
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 7, 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?

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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.8MITRECVSS:3.1/AC:H/AV:N/A:H/C:N/I:N/PR:N/S:C/UI:N

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-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application 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