Unauthorized calls via out-of-bounds XML parsing
Published May 1, 2024 · Updated Aug 1, 2024
Out-of-bounds write in Cisco IP Phone firmware allows remote attackers to initiate calls or play sounds through crafted XML requests. The XML service parses attacker-supplied XML without bounds checking, permitting an out-of-bounds write that drives phone actions. The service is disabled by default; exposure requires it to be enabled, and successful exploitation changes device behavior by placing calls or playing audio.
Summary
What happened
Out-of-bounds write in Cisco IP Phone firmware allows remote attackers to initiate calls or play sounds through crafted XML requests. The XML service parses attacker-supplied XML without bounds checking, permitting an out-of-bounds write that drives phone actions. The service is disabled by default; exposure requires it to be enabled, and successful exploitation changes device behavior by placing calls or playing audio.
The record
- CVE
- CVE-2024-20357
- Published
- May 1, 2024
- Updated
- Aug 1, 2024
- Vendor
- ClamAV
- Product
- Cisco IP Phone 6821 with Multiplatform Firmware
- Classifications
- CWE-787
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 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?
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- Affected versionversion=0 <=12.0.4
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
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Technologies
Your stack
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Your stack
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