CVE-2019-16779

In RubyGem excon, interrupted Persistent Connections May Leak Response Data

MEDIUM
5.9
CVSS Score
Published: December 16, 2019 at 07:35 PM UTC
Updated: July 28, 2026 at 06:35 PM UTC
4 products affected across 3 vendorsDebian LinuxLeapBackports Sle

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Severity
MEDIUM5.9
Exploit prediction
EPSS 2%

Description

In RubyGem excon before 0.71.0, there was a race condition around persistent connections, where a connection which is interrupted (such as by a timeout) would leave data on the socket. Subsequent requests would then read this data, returning content from the previous response. The race condition window appears to be short, and it would be difficult to purposefully exploit this.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.71.0< 0.71.0 ≤ v < 0.71.0< 0.71.0
Affected range stops below 0.71.0, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-664CWE-362

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