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CVE-2023-48795 Detail

Description

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
http://packetstormsecurity.com/files/176280/Terrapin-SSH-Connection-Weakening.html CVE, MITRE Third Party Advisory  VDB Entry 
http://seclists.org/fulldisclosure/2024/Mar/21 CVE, MITRE Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2023/12/18/3 CVE, MITRE Mailing List 
http://www.openwall.com/lists/oss-security/2023/12/19/5 CVE, MITRE Mailing List 
http://www.openwall.com/lists/oss-security/2023/12/20/3 CVE, MITRE Mailing List  Mitigation 
http://www.openwall.com/lists/oss-security/2024/03/06/3 CVE, MITRE Mailing List 
http://www.openwall.com/lists/oss-security/2024/04/17/8 CVE, MITRE Mailing List 
https://access.redhat.com/security/cve/cve-2023-48795 CVE, MITRE Third Party Advisory 
https://arstechnica.com/security/2023/12/hackers-can-break-ssh-channel-integrity-using-novel-data-corruption-attack/ CVE, MITRE Press/Media Coverage 
https://bugs.gentoo.org/920280 CVE, MITRE Issue Tracking 
https://bugzilla.redhat.com/show_bug.cgi?id=2254210 CVE, MITRE Issue Tracking 
https://bugzilla.suse.com/show_bug.cgi?id=1217950 CVE, MITRE Issue Tracking 
https://crates.io/crates/thrussh/versions CVE, MITRE Release Notes 
https://filezilla-project.org/versions.php CVE, MITRE Release Notes 
https://forum.netgate.com/topic/184941/terrapin-ssh-attack CVE, MITRE Issue Tracking 
https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.10&id=10e09e273f69e149389b3e0e5d44b8c221c2e7f6 CVE, MITRE Patch 
https://github.com/NixOS/nixpkgs/pull/275249 CVE, MITRE Release Notes 
https://github.com/PowerShell/Win32-OpenSSH/issues/2189 CVE, MITRE Issue Tracking 
https://github.com/PowerShell/Win32-OpenSSH/releases/tag/v9.5.0.0p1-Beta CVE, MITRE Release Notes 
https://github.com/TeraTermProject/teraterm/commit/7279fbd6ef4d0c8bdd6a90af4ada2899d786eec0 CVE, MITRE Patch 
https://github.com/TeraTermProject/teraterm/releases/tag/v5.1 CVE, MITRE Release Notes 
https://github.com/advisories/GHSA-45x7-px36-x8w8 CVE, MITRE Third Party Advisory 
https://github.com/apache/mina-sshd/issues/445 CVE, MITRE Issue Tracking 
https://github.com/connectbot/sshlib/commit/5c8b534f6e97db7ac0e0e579331213aa25c173ab CVE, MITRE Patch 
https://github.com/connectbot/sshlib/compare/2.2.21...2.2.22 CVE, MITRE Third Party Advisory 
https://github.com/cyd01/KiTTY/issues/520 CVE, MITRE Issue Tracking 
https://github.com/drakkan/sftpgo/releases/tag/v2.5.6 CVE, MITRE Release Notes 
https://github.com/erlang/otp/blob/d1b43dc0f1361d2ad67601169e90a7fc50bb0369/lib/ssh/doc/src/notes.xml#L39-L42 CVE, MITRE Patch 
https://github.com/erlang/otp/releases/tag/OTP-26.2.1 CVE, MITRE Release Notes 
https://github.com/golang/crypto/commit/9d2ee975ef9fe627bf0a6f01c1f69e8ef1d4f05d CVE, MITRE Patch 
https://github.com/hierynomus/sshj/issues/916 CVE, MITRE Issue Tracking 
https://github.com/janmojzis/tinyssh/issues/81 CVE, MITRE Issue Tracking 
https://github.com/jtesta/ssh-audit/commit/8e972c5e94b460379fe0c7d20209c16df81538a5 CVE, MITRE Patch 
https://github.com/libssh2/libssh2/pull/1291 CVE, MITRE Mitigation 
https://github.com/mkj/dropbear/blob/17657c36cce6df7716d5ff151ec09a665382d5dd/CHANGES#L25 CVE, MITRE Patch 
https://github.com/mscdex/ssh2/commit/97b223f8891b96d6fc054df5ab1d5a1a545da2a3 CVE, MITRE Patch 
https://github.com/mwiede/jsch/compare/jsch-0.2.14...jsch-0.2.15 CVE, MITRE Product 
https://github.com/mwiede/jsch/issues/457 CVE, MITRE Issue Tracking 
https://github.com/mwiede/jsch/pull/461 CVE, MITRE Release Notes 
https://github.com/net-ssh/net-ssh/blob/2e65064a52d73396bfc3806c9196fc8108f33cd8/CHANGES.txt#L14-L16 CVE, MITRE Patch 
https://github.com/openssh/openssh-portable/commits/master CVE, MITRE Patch 
https://github.com/paramiko/paramiko/issues/2337 CVE, MITRE Issue Tracking 
https://github.com/proftpd/proftpd/blob/0a7ea9b0ba9fcdf368374a226370d08f10397d99/RELEASE_NOTES CVE, MITRE Release Notes 
https://github.com/proftpd/proftpd/blob/d21e7a2e47e9b38f709bec58e3fa711f759ad0e1/RELEASE_NOTES CVE, MITRE Release Notes 
https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES CVE, MITRE Release Notes 
https://github.com/proftpd/proftpd/issues/456 CVE, MITRE Issue Tracking 
https://github.com/rapier1/hpn-ssh/releases CVE, MITRE Release Notes 
https://github.com/ronf/asyncssh/blob/develop/docs/changes.rst CVE, MITRE Release Notes 
https://github.com/ronf/asyncssh/tags CVE, MITRE Release Notes 
https://github.com/ssh-mitm/ssh-mitm/issues/165 CVE, MITRE Issue Tracking 
https://github.com/warp-tech/russh/releases/tag/v0.40.2 CVE, MITRE Release Notes 
https://gitlab.com/libssh/libssh-mirror/-/tags CVE, MITRE Release Notes 
https://groups.google.com/g/golang-announce/c/-n5WqVC18LQ CVE, MITRE Mailing List 
https://groups.google.com/g/golang-announce/c/qA3XtxvMUyg CVE, MITRE Mailing List 
https://help.panic.com/releasenotes/transmit5/ CVE, MITRE Release Notes 
https://jadaptive.com/important-java-ssh-security-update-new-ssh-vulnerability-discovered-cve-2023-48795/ CVE, MITRE Press/Media Coverage 
https://lists.debian.org/debian-lts-announce/2023/12/msg00017.html CVE, MITRE Mailing List 
https://lists.debian.org/debian-lts-announce/2024/01/msg00013.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2024/01/msg00014.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33XHJUB6ROFUOH2OQNENFROTVH6MHSHA/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CAYYW35MUTNO65RVAELICTNZZFMT2XS/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3JIMLVBDWOP4FUPXPTB4PGHHIOMGFLQE/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YQLUQWLIHDB5QCXQEX7HXHAWMOKPP5O/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y74KVCPEPT4MVU3LHDWCNNOXOE5ZLUR/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APYIXIQOVDCRWLHTGB4VYMAUIAQLKYJ3/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL5KTLOSLH2KHRN4HCXJPK3JUVLDGEL6/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C3AFMZ6MH2UHHOPIWT5YLSFV3D2VB3AC/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHITS4PUOZAKFIUBQAQZC7JWXMOYE4B/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7EYCFQCTSGJXWO3ZZ44MGKFC5HA7G3Y/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HYEDEXIKFKTUJIN43RG4B7T5ZS6MHUSP/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I724O3LSRCPO4WNVIXTZCT4VVRMXMMSG/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KEOTKBUPZXHE3F352JBYNTSNRXYLWD6P/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KMZCVGUGJZZVDPCVDA7TEB22VUCNEXDD/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L5Y6MNNVAPIJSXJERQ6PKZVCIUXSNJK7/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/ CVE, MITRE Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/ CVE, MITRE Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI3EHAHABFQK7OABNCSF5GMYP6TONTI7/ CVE, MITRE Mailing List  Third Party Advisory 
https://matt.ucc.asn.au/dropbear/CHANGES CVE, MITRE Release Notes 
https://nest.pijul.com/pijul/thrussh/changes/D6H7OWTTMHHX6BTB3B6MNBOBX2L66CBL4LGSEUSAI2MCRCJDQFRQC CVE, MITRE Patch 
https://news.ycombinator.com/item?id=38684904 CVE, MITRE Issue Tracking 
https://news.ycombinator.com/item?id=38685286 CVE, MITRE Issue Tracking 
https://news.ycombinator.com/item?id=38732005 CVE, MITRE Issue Tracking 
https://nova.app/releases/#v11.8 CVE, MITRE Release Notes 
https://oryx-embedded.com/download/#changelog CVE, MITRE Release Notes 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0002 CVE, MITRE Third Party Advisory 
https://roumenpetrov.info/secsh/#news20231220 CVE, MITRE Release Notes 
https://security-tracker.debian.org/tracker/CVE-2023-48795 CVE, MITRE Vendor Advisory 
https://security-tracker.debian.org/tracker/source-package/libssh2 CVE, MITRE Vendor Advisory 
https://security-tracker.debian.org/tracker/source-package/proftpd-dfsg CVE, MITRE Vendor Advisory 
https://security-tracker.debian.org/tracker/source-package/trilead-ssh2 CVE, MITRE Issue Tracking 
https://security.gentoo.org/glsa/202312-16 CVE, MITRE Third Party Advisory 
https://security.gentoo.org/glsa/202312-17 CVE, MITRE Third Party Advisory 
https://security.netapp.com/advisory/ntap-20240105-0004/ CVE, MITRE Third Party Advisory 
https://support.apple.com/kb/HT214084 CVE, MITRE Third Party Advisory 
https://thorntech.com/cve-2023-48795-and-sftp-gateway/ CVE, MITRE Third Party Advisory 
https://twitter.com/TrueSkrillor/status/1736774389725565005 CVE, MITRE Press/Media Coverage 
https://ubuntu.com/security/CVE-2023-48795 CVE, MITRE Vendor Advisory 
https://winscp.net/eng/docs/history#6.2.2 CVE, MITRE Release Notes 
https://www.bitvise.com/ssh-client-version-history#933 CVE, MITRE Release Notes 
https://www.bitvise.com/ssh-server-version-history CVE, MITRE Release Notes 
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html CVE, MITRE Release Notes 
https://www.crushftp.com/crush10wiki/Wiki.jsp?page=Update CVE, MITRE Release Notes 
https://www.debian.org/security/2023/dsa-5586 CVE, MITRE Issue Tracking 
https://www.debian.org/security/2023/dsa-5588 CVE, MITRE Issue Tracking 
https://www.freebsd.org/security/advisories/FreeBSD-SA-23:19.openssh.asc CVE, MITRE Release Notes 
https://www.lancom-systems.de/service-support/allgemeine-sicherheitshinweise#c243508 CVE, MITRE Vendor Advisory 
https://www.netsarang.com/en/xshell-update-history/ CVE, MITRE Release Notes 
https://www.openssh.com/openbsd.html CVE, MITRE Release Notes 
https://www.openssh.com/txt/release-9.6 CVE, MITRE Release Notes 
https://www.openwall.com/lists/oss-security/2023/12/18/2 CVE, MITRE Mailing List 
https://www.openwall.com/lists/oss-security/2023/12/20/3 CVE, MITRE Mailing List  Mitigation 
https://www.paramiko.org/changelog.html CVE, MITRE Release Notes 
https://www.reddit.com/r/sysadmin/comments/18idv52/cve202348795_why_is_this_cve_still_undisclosed/ CVE, MITRE Issue Tracking 
https://www.suse.com/c/suse-addresses-the-ssh-v2-protocol-terrapin-attack-aka-cve-2023-48795/ CVE, MITRE Press/Media Coverage 
https://www.terrapin-attack.com CVE, MITRE Exploit 
https://www.theregister.com/2023/12/20/terrapin_attack_ssh CVE, MITRE Press/Media Coverage 
https://www.vandyke.com/products/securecrt/history.txt CVE, MITRE Release Notes 
https://www.vicarius.io/vsociety/posts/cve-2023-48795-detect-openssh-vulnerabilit CVE Exploit  Third Party Advisory 
https://www.vicarius.io/vsociety/posts/cve-2023-48795-mitigate-openssh-vulnerability CVE Exploit  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-354 Improper Validation of Integrity Check Value cwe source acceptance level NIST  

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Change History

48 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-48795
NVD Published Date:
12/18/2023
NVD Last Modified:
05/22/2025
Source:
MITRE