Unauthenticated service crash via Content-Length integer overflow
Published Mar 15, 2023 · Updated Feb 25, 2025
Integer overflow in OpenSIPS before 3.1.9 and 3.2.0 through 3.2.5 allows remote attackers to crash the SIP server. The parse_content_length function multiplies a signed integer before testing for a negative result, but optimized builds can discard that overflow check. Exploitation requires a crafted Request-URI, Content-Length above 2147483647, and unusually large shared memory configured with -m; the result is a segmentation fault and service crash.
Summary
What happened
Integer overflow in OpenSIPS before 3.1.9 and 3.2.0 through 3.2.5 allows remote attackers to crash the SIP server. The parse_content_length function multiplies a signed integer before testing for a negative result, but optimized builds can discard that overflow check. Exploitation requires a crafted Request-URI, Content-Length above 2147483647, and unusually large shared memory configured with -m; the result is a segmentation fault and service crash.
The record
- CVE
- CVE-2023-28097
- Published
- Mar 15, 2023
- Updated
- Feb 25, 2025
- Vendor
- OpenSIPS
- Product
- OpenSIPS
- Classifications
- CWE-190, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 15, 2023CVE publishedPublication date reported by the CVE source.
- Feb 25, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 3.1.9
- Affected versionversion=>= 3.2.0, < 3.2.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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