Kernel and process-memory disclosure via FTP length miscalculation
Published May 13, 2020 · Updated Aug 4, 2024
Out-of-bounds read in FreeBSD libalias FTP handling allows attackers to disclose kernel or natd process memory through crafted packets. The FTP protocol handler miscalculates a rewritten packet length and reads beyond the allocated packet buffer. Exposure requires an affected host to process attacker-controlled FTP traffic through in-kernel NAT or the userspace natd service.
Summary
What happened
Out-of-bounds read in FreeBSD libalias FTP handling allows attackers to disclose kernel or natd process memory through crafted packets. The FTP protocol handler miscalculates a rewritten packet length and reads beyond the allocated packet buffer. Exposure requires an affected host to process attacker-controlled FTP traffic through in-kernel NAT or the userspace natd service.
The record
- CVE
- CVE-2020-7455
- Published
- May 13, 2020
- Updated
- Aug 4, 2024
- Vendor
- The FreeBSD Project
- Product
- FreeBSD
- Classifications
- CWE-772, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 13, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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.
- Affected versionversion=FreeBSD 12.1-RELEASE before p5, 11.4-BETA1 before p1, and 11.3-RELEASE before p9
What conditions does exploitation require?
What is affected?
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.
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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