CVE-2020-15953

HIGH
7.4
CVSS Score
Published: July 27, 2020 at 06:07 AM UTC
Updated: June 17, 2026 at 02:57 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraLibetpan

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Severity
HIGH7.4
Exploit prediction
EPSS 2%

Description

LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, has a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a meddler-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Affected

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

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-74

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