Authenticated connection termination via MLSD buffer over-read
Published Oct 24, 2024 · Updated Oct 28, 2024
Out-of-bounds read in Pure-FTPd before 1.0.52 allows remote authenticated users to terminate their own FTP control connection. In ls.c, domlsd() advances the base pointer while scanning MLSD option text without first checking for the command buffer's terminating null byte, so a long crafted argument drives the read beyond that buffer. An FTP login and an oversized MLSD command are required; upstream analysis reports no server-wide security impact beyond closing that user's connection.
Summary
What happened
Out-of-bounds read in Pure-FTPd before 1.0.52 allows remote authenticated users to terminate their own FTP control connection. In ls.c, domlsd() advances the base pointer while scanning MLSD option text without first checking for the command buffer's terminating null byte, so a long crafted argument drives the read beyond that buffer. An FTP login and an oversized MLSD command are required; upstream analysis reports no server-wide security impact beyond closing that user's connection.
The record
- CVE
- CVE-2024-48208
- Published
- Oct 24, 2024
- Updated
- Oct 28, 2024
- Vendor
- Pure-FTPd
- Product
- Pure-FTPd
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 24, 2024CVE publishedPublication date reported by the CVE source.
- Oct 28, 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=0 <1.0.52
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
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
- Authenticated MLSD over-read proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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