Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.

An update of the erlang package has been released.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5906 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5906-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 20, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : erlang     CVE ID         : CVE-2023-48795 CVE-2025-26618 CVE-2025-30211                      CVE-2025-32433

    Several vulnerabilities were discovered in the Erlang/OTP implementation     of the SSH protocol, which may result in denial of service or the     execution of arbitrary code.

    For the stable distribution (bookworm), these problems have been fixed in     version 1:25.2.3+dfsg-1+deb12u1.

    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 Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4132 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4132-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     April 21, 2025                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : erlang     Version        : 1:23.2.6+dfsg-1+deb11u2     CVE ID         : CVE-2023-48795 CVE-2025-26618 CVE-2025-30211 CVE-2025-32433     Debian Bug     : 1059002 1101713 1103442

    Multiple vulnerabilties were fixed in erlang.

    CVE-2023-48795 (Terrapin attack)

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-26618

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-30211

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-32433

        A SSH server may allow an attacker to perform unauthenticated         remote code execution (RCE). By exploiting a flaw in SSH protocol         message handling, a malicious actor could gain unauthorized access         to affected systems and execute arbitrary commands without valid         credentials.

    For Debian 11 bullseye, these problems have been fixed in version     1:23.2.6+dfsg-1+deb11u2.

    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.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:1051-1 advisory.

    - CVE-2025-26618: Fixed incorrect verification of SSH SFTP packet size in Erlang OTP (bsc#1237467)

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

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

The version of erlang installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-26618 advisory.

  - Erlang is a programming language and runtime system for building massively scalable soft real-time systems     with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang     runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified     properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are     received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size     and potentially cause large amount of memory to be allocated. Note that situation described above can only     happen for successfully authenticated users after completing the SSH handshake. This issue has been     patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this     vulnerability. (CVE-2025-26618)

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

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:0901-1 advisory.

    - CVE-2025-26618: Fixed SSH SFTP packet size not verified properly in Erlang OTP (bsc#1237467).

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

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

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7313-1 advisory.

    It was discovered that Erlang incorrectly handled SFTP packet sizes. A remote attacker could possibly use     this issue to cause Erlang to consume resources, resulting in a denial of service.

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

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

The version of erlang installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-26618 advisory.

  - Erlang is a programming language and runtime system for building massively scalable soft real-time systems     with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang     runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified     properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are     received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size     and potentially cause large amount of memory to be allocated. Note that situation described above can only     happen for successfully authenticated users after completing the SSH handshake. This issue has been     patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this     vulnerability. (CVE-2025-26618)

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

ID	Name	Product	Family	Severity
234711	Photon OS 5.0: Erlang PHSA-2025-5.0-0505	Nessus	PhotonOS Local Security Checks	high
234690	Debian dsa-5906 : erlang - security update	Nessus	Debian Local Security Checks	high
234684	Debian dla-4132 : erlang - security update	Nessus	Debian Local Security Checks	high
234549	Photon OS 4.0: Erlang PHSA-2025-4.0-0782	Nessus	PhotonOS Local Security Checks	high
233486	SUSE SLES15 / openSUSE 15 Security Update : erlang26 (SUSE-SU-2025:1051-1)	Nessus	SuSE Local Security Checks	high
233165	Azure Linux 3.0 Security Update: erlang (CVE-2025-26618)	Nessus	Azure Linux Local Security Checks	high
233040	SUSE SLES15 / openSUSE 15 Security Update : erlang (SUSE-SU-2025:0901-1)	Nessus	SuSE Local Security Checks	high
217106	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Erlang vulnerability (USN-7313-1)	Nessus	Ubuntu Local Security Checks	high
217101	CBL Mariner 2.0 Security Update: erlang (CVE-2025-26618)	Nessus	MarinerOS Local Security Checks	high

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CVE-2025-26618

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