CVE-2020-15953

high
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
8.0

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."

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-15953

OS impact

OSVersionStatusFixed in
arch archfixed1.9.4-3
debian debianbookwormfixed1.9.4-3
debian debianbullseyefixed1.9.4-3
debian debianforkyfixed1.9.4-3
debian debiansidfixed1.9.4-3
debian debiantrixiefixed1.9.4-3

References

Verify integrity in audit chain (admin only). AS-IS.