CVE-2023-48795

Katalog CVE

CVSS 5.9 · Medium EPSS 93,5%

Kerentanan Improper Validation of Integrity Check Value pada openbsd openssh, putty +49 lainnya. Skor CVSS 3.1 5.9 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

18 Desember 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

5.9 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-354: Improper Validation of Integrity Check Value

EPSS (30 hari)

93,5% peluang dieksploitasi; lebih tinggi dari 99,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 83 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MKQRBF3DWMWPH... advisory vendor
• https://security-tracker.debian.org/tracker/CVE-2023-48795 advisory vendor
• https://security-tracker.debian.org/tracker/source-package/libssh2 advisory vendor
• https://security-tracker.debian.org/tracker/source-package/proftpd-dfsg advisory vendor
• https://ubuntu.com/security/CVE-2023-48795 advisory vendor
• https://www.lancom-systems.de/service-support/allgemeine-sicherheitshinweise#c243508 advisory vendor
• https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.10&id=10e09e273f69e149389b3e0e5d44b8c221c2e7f6 patch
• https://github.com/TeraTermProject/teraterm/commit/7279fbd6ef4d0c8bdd6a90af4ada2899d786eec0 patch
• https://github.com/connectbot/sshlib/commit/5c8b534f6e97db7ac0e0e579331213aa25c173ab patch
• https://github.com/erlang/otp/blob/d1b43dc0f1361d2ad67601169e90a7fc50bb0369/lib/ssh/doc/src/notes.xml#L39-L42 patch
• https://github.com/golang/crypto/commit/9d2ee975ef9fe627bf0a6f01c1f69e8ef1d4f05d patch
• https://github.com/jtesta/ssh-audit/commit/8e972c5e94b460379fe0c7d20209c16df81538a5 patch
• https://github.com/mkj/dropbear/blob/17657c36cce6df7716d5ff151ec09a665382d5dd/CHANGES#L25 patch
• https://github.com/mscdex/ssh2/commit/97b223f8891b96d6fc054df5ab1d5a1a545da2a3 patch
• https://github.com/net-ssh/net-ssh/blob/2e65064a52d73396bfc3806c9196fc8108f33cd8/CHANGES.txt#L14-L16 patch
• https://github.com/openssh/openssh-portable/commits/master patch
• https://nest.pijul.com/pijul/thrussh/changes/D6H7OWTTMHHX6BTB3B6MNBOBX2L66CBL4LGSEUSAI2MCRCJDQFRQC patch
• http://www.openwall.com/lists/oss-security/2023/12/20/3 mailing list · mitigasi
• https://github.com/libssh2/libssh2/pull/1291 mitigasi
• https://www.openwall.com/lists/oss-security/2023/12/20/3 mailing list · mitigasi
• http://packetstormsecurity.com/files/176280/Terrapin-SSH-Connection-Weakening.html advisory pihak ketiga · vdb entry
• http://seclists.org/fulldisclosure/2024/Mar/21 mailing list · advisory pihak ketiga
• https://access.redhat.com/security/cve/cve-2023-48795 advisory pihak ketiga
• https://github.com/advisories/GHSA-45x7-px36-x8w8 advisory pihak ketiga
• https://github.com/connectbot/sshlib/compare/2.2.21...2.2.22 advisory pihak ketiga