CVE-2023-48795 : Detail

CVE-2023-48795

5.9
/
Medium
95.38%V3
Network
2023-12-17
23h00 +00:00
2024-08-02
21h46 +00:00
CVE.org
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CVE Descriptions

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, 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 or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in [email protected] and (if CBC is used) the [email protected] MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-354 Improper Validation of Integrity Check Value
The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.

Metrics

Metrics Score Severity CVSS Vector Source
V3.1 5.9 MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

High

successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

None

There is no impact to availability within the impacted component.

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Products Mentioned

Configuraton 0

Openbsd>>Openssh >> Version To (excluding) 9.6

Configuraton 0

Putty>>Putty >> Version To (excluding) 0.80

Configuraton 0

Filezilla-project>>Filezilla_client >> Version To (excluding) 3.66.4

Configuraton 0

Microsoft>>Powershell >> Version To (including) 11.1.0

Configuraton 0

Apple>>Macos >> Version -

Panic>>Transmit_5 >> Version To (excluding) 5.10.4

    Configuraton 0

    Apple>>Macos >> Version -

    Panic>>Nova >> Version To (excluding) 11.8

      Configuraton 0

      Roumenpetrov>>Pkixssh >> Version To (excluding) 14.4

        Configuraton 0

        Winscp>>Winscp >> Version To (excluding) 6.2.2

        Configuraton 0

        Bitvise>>Ssh_client >> Version To (excluding) 9.33

          Configuraton 0

          Bitvise>>Ssh_server >> Version To (excluding) 9.32

            Configuraton 0

            Lancom-systems>>Lcos >> Version To (including) 3.66.4

              Configuraton 0

              Lancom-systems>>Lcos_fx >> Version -

              Configuraton 0

              Lancom-systems>>Lcos_lx >> Version -

              Configuraton 0

              Lancom-systems>>Lcos_sx >> Version 4.20

              Lancom-systems>>Lcos_sx >> Version 5.20

              Configuraton 0

              Lancom-systems>>Lanconfig >> Version -

              Configuraton 0

              Vandyke>>Securecrt >> Version To (excluding) 9.4.3

              Configuraton 0

              Libssh>>Libssh >> Version To (excluding) 0.10.6

              Configuraton 0

              Net-ssh>>Net-ssh >> Version 7.2.0

              Configuraton 0

              Ssh2_project>>Ssh2 >> Version To (including) 1.11.0

              Configuraton 0

              Proftpd>>Proftpd >> Version To (including) 1.3.8b

              Configuraton 0

              Freebsd>>Freebsd >> Version To (including) 12.4

              Configuraton 0

              Crates>>Thrussh >> Version To (excluding) 0.35.1

                Configuraton 0

                Tera_term_project>>Tera_term >> Version To (including) 5.1

                Configuraton 0

                Oryx-embedded>>Cyclone_ssh >> Version To (excluding) 2.3.4

                  Configuraton 0

                  Crushftp>>Crushftp >> Version To (including) 10.6.0

                  Configuraton 0

                  Netsarang>>Xshell_7 >> Version To (excluding) build__0144

                    Configuraton 0

                    Paramiko>>Paramiko >> Version To (excluding) 3.4.0

                    Configuraton 0

                    Redhat>>Openshift_container_platform >> Version 4.0

                    Configuraton 0

                    Redhat>>Openstack_platform >> Version 16.1

                    Redhat>>Openstack_platform >> Version 16.2

                    Redhat>>Openstack_platform >> Version 17.1

                    Configuraton 0

                    Redhat>>Ceph_storage >> Version 6.0

                    Configuraton 0

                    Redhat>>Enterprise_linux >> Version 8.0

                    Redhat>>Enterprise_linux >> Version 9.0

                    Configuraton 0

                    Redhat>>Openshift_serverless >> Version -

                    Configuraton 0

                    Redhat>>Openshift_gitops >> Version -

                    Configuraton 0

                    Redhat>>Openshift_pipelines >> Version -

                    Configuraton 0

                    Redhat>>Openshift_developer_tools_and_services >> Version -

                    Configuraton 0

                    Redhat>>Openshift_data_foundation >> Version 4.0

                    Configuraton 0

                    Redhat>>Openshift_api_for_data_protection >> Version -

                    Configuraton 0

                    Redhat>>Openshift_virtualization >> Version 4

                    Configuraton 0

                    Redhat>>Storage >> Version 3.0

                    Configuraton 0

                    Redhat>>Discovery >> Version -

                    Configuraton 0

                    Redhat>>Openshift_dev_spaces >> Version -

                    Configuraton 0

                    Redhat>>Cert-manager_operator_for_red_hat_openshift >> Version -

                    Configuraton 0

                    Redhat>>Keycloak >> Version -

                    Configuraton 0

                    Redhat>>Jboss_enterprise_application_platform >> Version 7.0

                    Configuraton 0

                    Redhat>>Single_sign-on >> Version 7.0

                    Configuraton 0

                    Redhat>>Advanced_cluster_security >> Version 3.0

                    Redhat>>Advanced_cluster_security >> Version 4.0

                    Configuraton 0

                    Golang>>Crypto >> Version To (excluding) 0.17.0

                    Configuraton 0

                    Russh_project>>Russh >> Version To (excluding) 0.40.2

                    Configuraton 0

                    Sftpgo_project>>Sftpgo >> Version To (excluding) 2.5.6

                    Configuraton 0

                    Erlang>>Erlang\/otp >> Version To (excluding) 26.2.1

                    Configuraton 0

                    Matez>>Jsch >> Version To (excluding) 0.2.15

                      Configuraton 0

                      Libssh2>>Libssh2 >> Version To (excluding) 1.11.1

                      Configuraton 0

                      Asyncssh_project>>Asyncssh >> Version To (excluding) 2.14.2

                      Configuraton 0

                      Dropbear_ssh_project>>Dropbear_ssh >> Version To (excluding) 2022.83

                      Configuraton 0

                      Jadaptive>>Maverick_synergy_java_ssh_api >> Version To (excluding) 3.1.0-snapshot

                        Configuraton 0

                        Ssh>>Ssh >> Version To (excluding) 5.11

                        Configuraton 0

                        Thorntech>>Sftp_gateway_firmware >> Version To (excluding) 3.4.6

                        Configuraton 0

                        Netgate>>Pfsense_plus >> Version To (including) 23.09.1

                        Configuraton 0

                        Netgate>>Pfsense_ce >> Version To (including) 2.7.2

                          Configuraton 0

                          Crushftp>>Crushftp >> Version To (excluding) 10.6.0

                          Configuraton 0

                          Connectbot>>Sshlib >> Version To (excluding) 2.2.22

                            Configuraton 0

                            Apache>>Sshd >> Version To (including) 2.11.0

                            Configuraton 0

                            Apache>>Sshj >> Version To (including) 0.37.0

                              Configuraton 0

                              Tinyssh>>Tinyssh >> Version To (including) 20230101

                                Configuraton 0

                                Trilead>>Ssh2 >> Version 6401

                                  Configuraton 0

                                  9bis>>Kitty >> Version To (including) 0.76.1.13

                                  Configuraton 0

                                  Gentoo>>Security >> Version -

                                  Debian>>Debian_linux >> Version -

                                  Configuraton 0

                                  Fedoraproject>>Fedora >> Version 38

                                  Fedoraproject>>Fedora >> Version 39

                                  Configuraton 0

                                  Debian>>Debian_linux >> Version 10.0

                                  Configuraton 0

                                  Apple>>Macos >> Version From (including) 14.0 To (excluding) 14.4

                                  References

                                  https://bugs.gentoo.org/920280
                                  Tags : Issue Tracking
                                  https://support.apple.com/kb/HT214084
                                  Tags : Third Party Advisory