Debian dla-4590 : erlang - security update

high Nessus Plugin ID 315240

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4590 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4590-1 [email protected] https://www.debian.org/lts/security/ Lucas Kanashiro May 18, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : erlang Version : 1:23.2.6+dfsg-1+deb11u4 CVE ID : CVE-2026-21620 CVE-2026-23941 CVE-2026-23942 CVE-2026-23943 Debian Bug : 1128651 1130912

Multiple vulnerabilities were discoverd in Erlang, a concurrent, real-time, distributed functional language.

CVE-2026-21620

Insufficient path sanitizing in tftp_file module.

CVE-2026-23941

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in Erlang OTP (inets httpd module) allows HTTP Request Smuggling.

CVE-2026-23942

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP (ssh_sftpd module) allows Path Traversal.

CVE-2026-23943

Improper Handling of Highly Compressed Data (Compression Bomb) vulnerability in Erlang OTP ssh (ssh_transport modules) allows Denial of Service via Resource Depletion.

For Debian 11 bullseye, these problems have been fixed in version 1:23.2.6+dfsg-1+deb11u4.

We recommend that you upgrade your erlang packages.

For the detailed security status of erlang please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/erlang

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the erlang packages.

Plugin Details

Severity: High

ID: 315240

File Name: debian_DLA-4590.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/19/2026

Updated: 5/19/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-21620

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-23942

CVSS v4

Risk Factor: High

Base Score: 7

Threat Score: 2.8

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L

CVSS Score Source: CVE-2026-23941

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:erlang-mode, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:erlang-runtime-tools, p-cpe:/a:debian:debian_linux:erlang-ssh, p-cpe:/a:debian:debian_linux:erlang-jinterface, p-cpe:/a:debian:debian_linux:erlang-erl-docgen, p-cpe:/a:debian:debian_linux:erlang, p-cpe:/a:debian:debian_linux:erlang-manpages, p-cpe:/a:debian:debian_linux:erlang-os-mon, p-cpe:/a:debian:debian_linux:erlang-nox, p-cpe:/a:debian:debian_linux:erlang-common-test, p-cpe:/a:debian:debian_linux:erlang-reltool, p-cpe:/a:debian:debian_linux:erlang-crypto, p-cpe:/a:debian:debian_linux:erlang-observer, p-cpe:/a:debian:debian_linux:erlang-edoc, p-cpe:/a:debian:debian_linux:erlang-x11, p-cpe:/a:debian:debian_linux:erlang-base, p-cpe:/a:debian:debian_linux:erlang-asn1, p-cpe:/a:debian:debian_linux:erlang-snmp, p-cpe:/a:debian:debian_linux:erlang-base-hipe, p-cpe:/a:debian:debian_linux:erlang-parsetools, p-cpe:/a:debian:debian_linux:erlang-xmerl, p-cpe:/a:debian:debian_linux:erlang-et, p-cpe:/a:debian:debian_linux:erlang-eunit, p-cpe:/a:debian:debian_linux:erlang-odbc, p-cpe:/a:debian:debian_linux:erlang-wx, p-cpe:/a:debian:debian_linux:erlang-examples, p-cpe:/a:debian:debian_linux:erlang-doc, p-cpe:/a:debian:debian_linux:erlang-ftp, p-cpe:/a:debian:debian_linux:erlang-eldap, p-cpe:/a:debian:debian_linux:erlang-mnesia, p-cpe:/a:debian:debian_linux:erlang-megaco, p-cpe:/a:debian:debian_linux:erlang-inets, p-cpe:/a:debian:debian_linux:erlang-src, p-cpe:/a:debian:debian_linux:erlang-tftp, p-cpe:/a:debian:debian_linux:erlang-dialyzer, p-cpe:/a:debian:debian_linux:erlang-tools, p-cpe:/a:debian:debian_linux:erlang-diameter, p-cpe:/a:debian:debian_linux:erlang-syntax-tools, p-cpe:/a:debian:debian_linux:erlang-public-key, p-cpe:/a:debian:debian_linux:erlang-ssl, p-cpe:/a:debian:debian_linux:erlang-dev, p-cpe:/a:debian:debian_linux:erlang-debugger

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/18/2026

Vulnerability Publication Date: 2/20/2026

Reference Information

CVE: CVE-2026-21620, CVE-2026-23941, CVE-2026-23942, CVE-2026-23943

IAVA: 2026-A-0204-S, 2026-A-0309

Detections

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