What’s Vulnerable › Vulnerabilities

CVE-2016-6298

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-09-01 · updated 2026-06-17
• Weakness: CWE-200

Description

The _Rsa15 class in the RSA 1.5 algorithm implementation in jwa.py in jwcrypto before 0.3.2 lacks the Random Filling protection mechanism, which makes it easier for remote attackers to obtain cleartext data via a Million Message Attack (MMA).

Affected products

• latchset jwcrypto: before 0.3.2 — fixed in 0.3.2

How to fix

Upgrade to a fixed version: latchset jwcrypto 0.3.2. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/92729
• https://github.com/latchset/jwcrypto/commit/eb5be5bd94c8cae1d7f3ba9801377084d8e5a7ba
• https://github.com/latchset/jwcrypto/issues/65
• https://github.com/latchset/jwcrypto/pull/66
• https://github.com/latchset/jwcrypto/releases/tag/v0.3.2
• http://www.securityfocus.com/bid/92729
• https://github.com/latchset/jwcrypto/commit/eb5be5bd94c8cae1d7f3ba9801377084d8e5a7ba
• https://github.com/latchset/jwcrypto/issues/65
• https://github.com/latchset/jwcrypto/pull/66
• https://github.com/latchset/jwcrypto/releases/tag/v0.3.2

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