Security update for openssh SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:20009-1 Final 1 1 2025-02-03T08:47:06Z current 2025-02-03T08:47:06Z 2025-02-03T08:47:06Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for openssh This update for openssh fixes the following issues: - CVE-2024-39894: Fixed timing attacks against echo-off password entry (bsc#1227318) - CVE-2024-6387: Fixed race condition in a signal handler (bsc#1226642). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-Micro-6.0-8 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-202520009-1/ Link for SUSE-SU-2025:20009-1 https://lists.suse.com/pipermail/sle-security-updates/2025-June/021369.html E-Mail link for SUSE-SU-2025:20009-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1217950 SUSE Bug 1217950 https://bugzilla.suse.com/1218215 SUSE Bug 1218215 https://bugzilla.suse.com/1226642 SUSE Bug 1226642 https://bugzilla.suse.com/1227318 SUSE Bug 1227318 https://www.suse.com/security/cve/CVE-2023-48795/ SUSE CVE CVE-2023-48795 page https://www.suse.com/security/cve/CVE-2023-51385/ SUSE CVE CVE-2023-51385 page https://www.suse.com/security/cve/CVE-2024-39894/ SUSE CVE CVE-2024-39894 page https://www.suse.com/security/cve/CVE-2024-6387/ SUSE CVE CVE-2024-6387 page SUSE Linux Micro 6.0 openssh-9.6p1-2.1 openssh-clients-9.6p1-2.1 openssh-common-9.6p1-2.1 openssh-fips-9.6p1-2.1 openssh-server-9.6p1-2.1 openssh-server-config-rootlogin-9.6p1-2.1 openssh-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 openssh-clients-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 openssh-common-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 openssh-fips-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 openssh-server-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 openssh-server-config-rootlogin-9.6p1-2.1 as a component of SUSE Linux Micro 6.0 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 chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com 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-2023-48795 SUSE Linux Micro 6.0:openssh-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-clients-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-common-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-fips-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-2.1 critical To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520009-1/ https://www.suse.com/security/cve/CVE-2023-48795.html CVE-2023-48795 https://bugzilla.suse.com/1217950 SUSE Bug 1217950 https://bugzilla.suse.com/1218708 SUSE Bug 1218708 In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host name has shell metacharacters, and this name is referenced by an expansion token in certain situations. For example, an untrusted Git repository can have a submodule with shell metacharacters in a user name or host name. CVE-2023-51385 SUSE Linux Micro 6.0:openssh-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-clients-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-common-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-fips-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-2.1 critical To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520009-1/ https://www.suse.com/security/cve/CVE-2023-51385.html CVE-2023-51385 https://bugzilla.suse.com/1218215 SUSE Bug 1218215 https://bugzilla.suse.com/1218708 SUSE Bug 1218708 OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur. CVE-2024-39894 SUSE Linux Micro 6.0:openssh-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-clients-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-common-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-fips-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-2.1 critical To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520009-1/ https://www.suse.com/security/cve/CVE-2024-39894.html CVE-2024-39894 https://bugzilla.suse.com/1227318 SUSE Bug 1227318 A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period. CVE-2024-6387 SUSE Linux Micro 6.0:openssh-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-clients-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-common-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-fips-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-9.6p1-2.1 SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520009-1/ https://www.suse.com/security/cve/CVE-2024-6387.html CVE-2024-6387 https://bugzilla.suse.com/1226641 SUSE Bug 1226641 https://bugzilla.suse.com/1226642 SUSE Bug 1226642