MediumCVE-2017-1000385

Erlang OTP: security vulnerability (CVE-2017-1000385)

Published 12.12.2017Sources: CVE.org

What is affected, what to do

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).

The available sources name no fixed version. Check the vendor guidance in the references below.

Affected: Erlang OTP eq 18.3.4.7..18.3.4.7
Erlang OTP eq 19.3.6.4..19.3.6.4
Erlang OTP eq 20.1.7..20.1.7
Debian Linux eq 8.0..8.0
Debian Linux eq 9.0..9.0

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Metrics

5.9

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

5.9

CVSS v3

Severity Medium on the scale from 0 to 10.

Source: CVE.org

22.1 %

EPSS score

Elevated — model estimates 10-50% exploitation likelihood.

Source: FIRST EPSS, percentile 97.7

Show all metrics

Severity: Medium
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 105.80 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 5.9 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 5.9
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 22.1 %; Elevated — model estimates 10-50% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 97.7; Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 12.12.2017

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

Source: NVD (NIST), cvelistv5

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
erlang	erlang\/otp	`18.3.4.7` `20.1.7` `19.3.6.4`	— — —

Vendors and products

Affected operating systems

Affected operating systems

Linux	debian	debian_linux	`8.0`
Linux	debian	debian_linux	`9.0`

References & sources

usn.ubuntu.comUSN-3571-1Vendor advisory, x_refsource_UBUNTU
access.redhat.comRHSA-2018:0528Vendor advisory, x_refsource_REDHAT
erlang.org[erlang-questions] 20171123 Patch Package: OTP 18.3.4.7Mailing list, x_refsource_MLIST, Issue tracking, Mailing list, Vendor advisory
lists.debian.org[debian-lts-announce] 20171215 [SECURITY] [DLA 1207-1] erlang security updateMailing list, x_refsource_MLIST
access.redhat.comRHSA-2018:0242Vendor advisory, x_refsource_REDHAT
robotattack.orgx_refsource_MISC, Issue tracking, Third-party advisory
erlang.org[erlang-questions] 20171123 Patch Package: OTP 19.3.6.4Mailing list, x_refsource_MLIST, Issue tracking, Mailing list, Vendor advisory
debian.orgDSA-4057Vendor advisory, x_refsource_DEBIAN, Issue tracking, Third-party advisory
access.redhat.comRHSA-2018:0368Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2018:0303Vendor advisory, x_refsource_REDHAT
erlang.org[erlang-questions] 20171123 Patch Package: OTP 20.1.7Mailing list, x_refsource_MLIST, Issue tracking, Mailing list, Vendor advisory
securityfocus.com102197Vulnerability database, x_refsource_BID, Third-party advisory, Vulnerability database
kb.cert.orgVU#144389Third-party advisory, x_refsource_CERT-VN, Issue tracking, Third-party advisory, US government resource

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