In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• fedoraproject fedora30
• fedoraproject fedora31
• pureftpd pure-ftpd1.0.49

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2017-12170Downstream version 1.0.46-1 of pure-ftpd as shipped in Fedora was vulnerable to packaging error due to which the original configuration was
  39Monitor
• CVE-2024-48208pure-ftpd before 1.0.52 is vulnerable to Buffer Overflow.
  34Monitor
• CVE-2011-1575The STARTTLS implementation in ftp_parser.c in Pure-FTPd before 1.0.30 does not properly restrict I/O buffering, which allows man-in-the-mid
  33Monitor
• CVE-2020-9274An issue was discovered in Pure-FTPd 1.0.49.
  32Monitor
• CVE-2020-9365An issue was discovered in Pure-FTPd 1.0.49.
  32Monitor
• CVE-2021-40524In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, whic
  31Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.