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).
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | erlang | 1:20.1.7+dfsg-1 | — |
| Debian 13 | erlang | 1:20.1.7+dfsg-1 | — |
| Debian 12 | erlang | 1:20.1.7+dfsg-1 | — |
| Debian 9 | erlang | 1:19.2.1+dfsg-2+deb9u1 | DSA-4057-1 |
| Debian 8 | erlang | 1:17.3-dfsg-4+deb8u2 | DSA-4057-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | erlang | 1:15.b.1-dfsg-4+deb7u2 | DLA-1207-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1 | USN-3571-1 |
| Ubuntu 14.04 LTS | erlang | 1:16.b.3-dfsg-1ubuntu2.2 | USN-3571-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 12 | erlang +39 | 18.3.4.7-1.el7ost | RHSA-2018:0242 |
| Red Hat OpenStack 11 | erlang +39 | 18.3.4.7-1.el7ost | RHSA-2018:0303 |
| Red Hat OpenStack 10 | erlang +39 | 18.3.4.7-1.el7ost | RHSA-2018:0368 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 9 | erlang +39 | 18.3.4.7-1.el7ost | RHSA-2018:0528 |
| Red Hat CloudForms 5 | ansible-tower +5 | 3.4.1-2.el7at | RHBA-2019:0453 |
| Red Hat CloudForms 5 | cfme | 5.10.1.2-2.el7cf | RHBA-2019:0453 |
| Red Hat CloudForms 5 | cfme-gemset +4 | 5.10.1.2-1.el7cf | RHBA-2019:0453 |
| Red Hat CloudForms 5 | erlang | 20.3.8.9-2.el7at | RHBA-2019:0453 |
| Red Hat CloudForms 5 | nginx +8 | 1:1.14.1-1.el7at | RHBA-2019:0453 |
| Red Hat CloudForms 5 | rabbitmq-server | 3.7.4-2.el7at | RHBA-2019:0453 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | erlang | 18.3.4.7-9.1 | openSUSE-SU-2017:3257-1, openSUSE-SU-2017:3255-1 |
| SUSE OpenStack Cloud 7 | erlang | 17.5.6-3.3.1 | SUSE-SU-2018:0974-1 |
| SUSE Enterprise Storage 4 | erlang | 17.5.6-3.3.1 | SUSE-SU-2018:0974-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
Scanner for Bleichenbacher Oracle in RSA PKCS #1 v1.5
auxiliary/scanner/ssl/bleichenbacher_oracle
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 11
- RHBA-2019:0453 Red Hat Bug Fix Advisory: CloudForms 4.7.1 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0528 Red Hat Security Advisory: erlang security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0368 Red Hat Security Advisory: erlang security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0303 Red Hat Security Advisory: erlang security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0242 Red Hat Security Advisory: erlang security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3571-1 erlang vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4057-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1207-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:0974-1 Security update for erlang SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:3257-1 Security update for erlang SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:3255-1 Security update for erlang SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-3571-1 vendor-advisory
- RHSA-2018:0528 vendor-advisory
- [erlang-questions] 20171123 Patch Package: OTP 18.3.4.7 mailing-list
- [debian-lts-announce] 20171215 [SECURITY] [DLA 1207-1] erlang security update mailing-list
- RHSA-2018:0242 vendor-advisory
- https://robotattack.org/
- [erlang-questions] 20171123 Patch Package: OTP 19.3.6.4 mailing-list
- DSA-4057 vendor-advisory
- RHSA-2018:0368 vendor-advisory
- RHSA-2018:0303 vendor-advisory
- [erlang-questions] 20171123 Patch Package: OTP 20.1.7 mailing-list
- 102197 vdb-entry
- VU#144389 third-party-advisory