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7.5

Decentralized Anonymous Payment System and PIVX allow signature reuse

CVE-2019-16753 · published 6 years ago
Summary

Both DAPS and PIVX create digital signatures from plain text strings instead of the exact data, which means a valid signature can be copied and used on a different transaction. This could let an attacker approve payments they did not create. Upgrade to the latest releases that use the corrected signing process as soon as possible.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
decentralized_anonymous_payment_system_project decentralized_anonymous_payment_system <= 2019-08-26
cpe:2.3:a:decentralized_anonymous_payment_system_project:decentralized_anonymous_payment_system:*:*:*:*:*:*:*:*
pivx private_instant_verified_transactions <= 3.4.0
cpe:2.3:a:pivx:private_instant_verified_transactions:*:*:*:*:*:*:*:*
Original advisory text
An issue was discovered in Decentralized Anonymous Payment System (DAPS) through 2019-08-26. The content to be signed is composed of a representation of strings, rather than being composed of their...
An issue was discovered in Decentralized Anonymous Payment System (DAPS) through 2019-08-26. The content to be signed is composed of a representation of strings, rather than being composed of their binary representations. This is a weak signature scheme design that would allow the reuse of signatures in some cases (or even the reuse of signatures, intended for one type of message, for another type). This also affects Private Instant Verified Transactions (PIVX) through 3.4.0.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.5 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-347Improper Verification of Cryptographic Signature
Timeline
Published4 Dec 2019
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2019-16753 · NVD
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