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Fencer Intel
high 7.5

CVE-2020-35733 json

An issue was discovered in Erlang/OTP before 23.2.2.

published 5y ago modified 4mo ago also EUVD-2020-23389

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

An issue was discovered in Erlang/OTP before 23.2.2. The ssl application 10.2 accepts and trusts an invalid X.509 certificate chain to a trusted root Certification Authority.

Patch / fix

  • erlang erlang/otp 23.2.2
  • erlang Debian 14, Debian 13, Debian 12 1:23.2.2+dfsg-1

debian advisories DEBIAN-CVE-2020-35733

  • erlang27 openSUSE Tumbleweed 27.1.3-1.1
  • erlang openSUSE Tumbleweed 24.0.5-2.1

opensuse advisories openSUSE-SU-2025:15740-1openSUSE-SU-2024:10740-1

  • erlang Alpine 3.21, Alpine 3.20, Alpine 3.19 +5 more 23.2.5-r0
  • erlang26 Alpine 3.22 23.2.5-r0

alpine advisories ALPINE-CVE-2020-35733

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • erlang Arch Linux 23.2.2-1

arch linux advisories AVG-1457

Is CVE-2020-35733 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-35733 updated cvss 7.5

erlang: accepts and trusts an invalid X.509 certificate chain

  • Red Hat CloudForms Management Engine 5 erlang, erlang-et, erlang-gs, erlang-ic, erlang-wx, erlang-ssh, +44 more Red Hat OpenStack Platform 10 (Newton) erlang, erlang-ic, erlang-ose, erlang-ssh, erlang-ssl, erlang-asn1, +34 more Red Hat OpenStack Platform 13 (Queens) erlang, erlang-ic, erlang-ftp, erlang-ose, erlang-ssh, erlang-ssl, +36 more Red Hat OpenStack Platform 16 (Train) erlang, erlang-ssl, erlang-asn1, erlang-erts, erlang-hipe, erlang-sasl, +16 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Tower 3 erlang
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.