Arbitrary Code Injection Affecting libetpan package, versions <1.6-1ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.23% (79th percentile)

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  • Snyk IDSNYK-UBUNTU1604-LIBETPAN-1020874
  • published22 Oct 2020
  • disclosed27 Jul 2020

Introduced: 27 Jul 2020

CVE-2020-15953  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 libetpan to version 1.6-1ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libetpan package and not the libetpan package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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."

CVSS Base Scores

version 3.1