CVE-2020-18770: An issue was discovered in function zzip_disk_entry_to_file_header in mmapped.c in zziplib 0.13.69, which will lead to a denial-of-service.

Affected versions

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

• gdraheim zziplib0.13.69

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-2024-39134A Stack Buffer Overflow vulnerability in zziplibv 0.13.77 allows attackers to cause a denial of service via the __zzip_fetch_disk_trailer()…
  30Monitor
• CVE-2026-111142Zziplib through 0.13.80 Out-of-Bounds Read via zzip_disk_findfirst
  27Monitor
• CVE-2018-16548An issue was discovered in ZZIPlib through 0.13.69.
  27Monitor

Published before and after this one in the same product

• ← EarlierCVE-2018-17828Oct 1, 2018 · Directory traversal vulnerability in ZZIPlib 0.13.69 allows attackers to overwrite arbitrary files via a ..
  22Monitor
• ← EarlierCVE-2020-18442Jun 18, 2021 · Infinite Loop in zziplib v0.13.69 allows remote attackers to cause a denial of service via the return value "zzip_file_read" in the…
  13Monitor
• Later →CVE-2026-111141Oct 15, 2026 · zziplib through 0.13.80 Out-of-Bounds Read via __zzip_parse_root_directory ZIP64 Parsing
  22Monitor

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.