What’s Vulnerable › Vulnerabilities

CVE-2017-18184

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-13 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in QPDF before 7.0.0. There is a stack-based out-of-bounds read in the function iterate_rc4 in QPDF_encryption.cc.

Affected products

• Qpdf Project Qpdf: before 7.0.0 — fixed in 7.0.0

How to fix

Upgrade to a fixed version: Qpdf Project Qpdf 7.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/qpdf/qpdf/commit/dea704f0ab7f625e1e7b3f9a1110b45b63157317
• https://github.com/qpdf/qpdf/issues/147
• https://usn.ubuntu.com/3638-1/
• https://github.com/qpdf/qpdf/commit/dea704f0ab7f625e1e7b3f9a1110b45b63157317
• https://github.com/qpdf/qpdf/issues/147
• https://usn.ubuntu.com/3638-1/

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