CVE-2023-48795: Prefix Truncation Attack against ChaCha20-Poly1305 and Encrypt-then-MAC aka Terrapin
(updated )
Terrapin is a prefix truncation attack targeting the SSH protocol. More precisely, Terrapin breaks the integrity of SSH’s secure channel. By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server at the beginning of the secure channel without the client or server noticing it.
References
- access.redhat.com/security/cve/cve-2023-48795
- arstechnica.com/security/2023/12/hackers-can-break-ssh-channel-integrity-using-novel-data-corruption-attack
- bugs.gentoo.org/920280
- bugzilla.redhat.com/show_bug.cgi?id=2254210
- bugzilla.suse.com/show_bug.cgi?id=1217950
- crates.io/crates/thrussh/versions
- filezilla-project.org/versions.php
- forum.netgate.com/topic/184941/terrapin-ssh-attack
- git.libssh.org/projects/libssh.git/commit/?h=stable-0.10&id=10e09e273f69e149389b3e0e5d44b8c221c2e7f6
- github.com/NixOS/nixpkgs/pull/275249
- github.com/PowerShell/Win32-OpenSSH/issues/2189
- github.com/PowerShell/Win32-OpenSSH/releases/tag/v9.5.0.0p1-Beta
- github.com/TeraTermProject/teraterm/commit/7279fbd6ef4d0c8bdd6a90af4ada2899d786eec0
- github.com/TeraTermProject/teraterm/releases/tag/v5.1
- github.com/advisories/GHSA-45x7-px36-x8w8
- github.com/apache/mina-sshd/issues/445
- github.com/connectbot/sshlib/commit/5c8b534f6e97db7ac0e0e579331213aa25c173ab
- github.com/connectbot/sshlib/compare/2.2.21...2.2.22
- github.com/cyd01/KiTTY/issues/520
- github.com/drakkan/sftpgo/releases/tag/v2.5.6
- github.com/erlang/otp/blob/d1b43dc0f1361d2ad67601169e90a7fc50bb0369/lib/ssh/doc/src/notes.xml
- github.com/erlang/otp/releases/tag/OTP-26.2.1
- github.com/golang/crypto/commit/9d2ee975ef9fe627bf0a6f01c1f69e8ef1d4f05d
- github.com/hierynomus/sshj/issues/916
- github.com/janmojzis/tinyssh/issues/81
- github.com/jtesta/ssh-audit/commit/8e972c5e94b460379fe0c7d20209c16df81538a5
- github.com/libssh2/libssh2/pull/1291
- github.com/mkj/dropbear/blob/17657c36cce6df7716d5ff151ec09a665382d5dd/CHANGES
- github.com/mscdex/ssh2/commit/97b223f8891b96d6fc054df5ab1d5a1a545da2a3
- github.com/mwiede/jsch/compare/jsch-0.2.14...jsch-0.2.15
- github.com/mwiede/jsch/issues/457
- github.com/mwiede/jsch/pull/461
- github.com/net-ssh/net-ssh/blob/2e65064a52d73396bfc3806c9196fc8108f33cd8/CHANGES.txt
- github.com/openssh/openssh-portable/commits/master
- github.com/paramiko/paramiko/issues/2337
- github.com/paramiko/paramiko/issues/2337
- github.com/proftpd/proftpd/blob/0a7ea9b0ba9fcdf368374a226370d08f10397d99/RELEASE_NOTES
- github.com/proftpd/proftpd/blob/d21e7a2e47e9b38f709bec58e3fa711f759ad0e1/RELEASE_NOTES
- github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- github.com/proftpd/proftpd/issues/456
- github.com/rapier1/hpn-ssh/releases
- github.com/ronf/asyncssh/blob/develop/docs/changes.rst
- github.com/ronf/asyncssh/tags
- github.com/ssh-mitm/ssh-mitm/issues/165
- github.com/warp-tech/russh
- github.com/warp-tech/russh/commit/1aa340a7df1d5be1c0f4a9e247aade76dfdd2951
- github.com/warp-tech/russh/releases/tag/v0.40.2
- github.com/warp-tech/russh/security/advisories/GHSA-45x7-px36-x8w8
- gitlab.com/libssh/libssh-mirror/-/tags
- go.dev/cl/550715
- go.dev/issue/64784
- groups.google.com/g/golang-announce/c/-n5WqVC18LQ
- groups.google.com/g/golang-announce/c/qA3XtxvMUyg
- help.panic.com/releasenotes/transmit5
- jadaptive.com/important-java-ssh-security-update-new-ssh-vulnerability-discovered-cve-2023-48795
- lists.debian.org/debian-lts-announce/2023/12/msg00017.html
- lists.debian.org/debian-lts-announce/2024/01/msg00013.html
- lists.debian.org/debian-lts-announce/2024/01/msg00014.html
- lists.debian.org/debian-lts-announce/2024/04/msg00016.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33XHJUB6ROFUOH2OQNENFROTVH6MHSHA
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CAYYW35MUTNO65RVAELICTNZZFMT2XS
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3JIMLVBDWOP4FUPXPTB4PGHHIOMGFLQE
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YQLUQWLIHDB5QCXQEX7HXHAWMOKPP5O
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y74KVCPEPT4MVU3LHDWCNNOXOE5ZLUR
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APYIXIQOVDCRWLHTGB4VYMAUIAQLKYJ3
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL5KTLOSLH2KHRN4HCXJPK3JUVLDGEL6
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C3AFMZ6MH2UHHOPIWT5YLSFV3D2VB3AC
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHITS4PUOZAKFIUBQAQZC7JWXMOYE4B
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7EYCFQCTSGJXWO3ZZ44MGKFC5HA7G3Y
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HYEDEXIKFKTUJIN43RG4B7T5ZS6MHUSP
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I724O3LSRCPO4WNVIXTZCT4VVRMXMMSG
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KEOTKBUPZXHE3F352JBYNTSNRXYLWD6P
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KMZCVGUGJZZVDPCVDA7TEB22VUCNEXDD
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L5Y6MNNVAPIJSXJERQ6PKZVCIUXSNJK7
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI3EHAHABFQK7OABNCSF5GMYP6TONTI7
- matt.ucc.asn.au/dropbear/CHANGES
- nest.pijul.com/pijul/thrussh/changes/D6H7OWTTMHHX6BTB3B6MNBOBX2L66CBL4LGSEUSAI2MCRCJDQFRQC
- news.ycombinator.com/item?id=38684904
- news.ycombinator.com/item?id=38685286
- news.ycombinator.com/item?id=38732005
- nova.app/releases/
- nvd.nist.gov/vuln/detail/CVE-2023-48795
- oryx-embedded.com/download/
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0002
- roumenpetrov.info/secsh/
- security-tracker.debian.org/tracker/CVE-2023-48795
- security-tracker.debian.org/tracker/source-package/libssh2
- security-tracker.debian.org/tracker/source-package/proftpd-dfsg
- security-tracker.debian.org/tracker/source-package/trilead-ssh2
- security.gentoo.org/glsa/202312-16
- security.gentoo.org/glsa/202312-17
- security.netapp.com/advisory/ntap-20240105-0004
- support.apple.com/kb/HT214084
- thorntech.com/cve-2023-48795-and-sftp-gateway
- twitter.com/TrueSkrillor/status/1736774389725565005
- ubuntu.com/security/CVE-2023-48795
- winscp.net/eng/docs/history
- www.bitvise.com/ssh-client-version-history
- www.bitvise.com/ssh-server-version-history
- www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- www.crushftp.com/crush10wiki/Wiki.jsp?page=Update
- www.debian.org/security/2023/dsa-5586
- www.debian.org/security/2023/dsa-5588
- www.freebsd.org/security/advisories/FreeBSD-SA-23:19.openssh.asc
- www.lancom-systems.de/service-support/allgemeine-sicherheitshinweise
- www.netsarang.com/en/xshell-update-history
- www.openssh.com/openbsd.html
- www.openssh.com/txt/release-9.6
- www.openwall.com/lists/oss-security/2023/12/18/2
- www.openwall.com/lists/oss-security/2023/12/20/3
- www.paramiko.org/changelog.html
- www.reddit.com/r/sysadmin/comments/18idv52/cve202348795_why_is_this_cve_still_undisclosed
- www.suse.com/c/suse-addresses-the-ssh-v2-protocol-terrapin-attack-aka-cve-2023-48795
- www.terrapin-attack.com/
- www.theregister.com/2023/12/20/terrapin_attack_ssh
- www.vandyke.com/products/securecrt/history.txt
Code Behaviors & Features
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