CVE-2017-1000385

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 22.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-12-12 · updated 2026-06-17
Weakness: CWE-203

Description

The Erlang otp TLS server answers with different TLS alerts to different error types in the RSA PKCS #1 1.5 padding. This allows an attacker to decrypt content or sign messages with the server's private key (this is a variation of the Bleichenbacher attack).

Affected products

Debian Linux: 8.0, 9.0
Erlang OTP: 18.3.4.7, 19.3.6.4, 20.1.7

References

http://erlang.org/pipermail/erlang-questions/2017-November/094255.html
http://erlang.org/pipermail/erlang-questions/2017-November/094256.html
http://erlang.org/pipermail/erlang-questions/2017-November/094257.html
http://www.securityfocus.com/bid/102197
https://access.redhat.com/errata/RHSA-2018:0242
https://access.redhat.com/errata/RHSA-2018:0303
https://access.redhat.com/errata/RHSA-2018:0368
https://access.redhat.com/errata/RHSA-2018:0528
https://lists.debian.org/debian-lts-announce/2017/12/msg00010.html
https://robotattack.org/
https://usn.ubuntu.com/3571-1/
https://www.debian.org/security/2017/dsa-4057

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