PyPI/paramiko CVE-2023-48795: medium 5.9, EPSS 93.55%

Prefix Truncation Attack against ChaCha20-Poly1305 and Encrypt-then-MAC aka Terrapin

Action: Upgrade paramiko to 3.4.0 or later.

pip install paramiko==3.4.0

Affected

Fixed versions

Sources

• osv: GHSA-45x7-px36-x8w8#PyPI/paramiko
• https://github.com/warp-tech/russh/security/advisories/GHSA-45x7-px36-x8w8
• https://nvd.nist.gov/vuln/detail/CVE-2023-48795
• https://github.com/ssh-mitm/ssh-mitm/issues/165
• https://github.com/hierynomus/sshj/issues/916
• https://github.com/janmojzis/tinyssh/issues/81
• https://github.com/cyd01/KiTTY/issues/520
• https://github.com/proftpd/proftpd/issues/456
• https://github.com/apache/mina-sshd/issues/445
• https://github.com/paramiko/paramiko/issues/2337#issuecomment-1887642773
• https://github.com/paramiko/paramiko/issues/2337
• https://github.com/PowerShell/Win32-OpenSSH/issues/2189
• https://github.com/mwiede/jsch/issues/457
• https://github.com/libssh2/libssh2/pull/1291
• https://github.com/NixOS/nixpkgs/pull/275249
• https://github.com/mwiede/jsch/pull/461
• https://github.com/TeraTermProject/teraterm/commit/7279fbd6ef4d0c8bdd6a90af4ada2899d786eec0
• https://github.com/mscdex/ssh2/commit/97b223f8891b96d6fc054df5ab1d5a1a545da2a3
• https://github.com/connectbot/sshlib/commit/5c8b534f6e97db7ac0e0e579331213aa25c173ab
• https://github.com/jtesta/ssh-audit/commit/8e972c5e94b460379fe0c7d20209c16df81538a5
• https://github.com/warp-tech/russh/commit/1aa340a7df1d5be1c0f4a9e247aade76dfdd2951
• https://github.com/golang/crypto/commit/9d2ee975ef9fe627bf0a6f01c1f69e8ef1d4f05d
• https://oryx-embedded.com/download/#changelog
• https://nova.app/releases/#v11.8
• https://news.ycombinator.com/item?id=38732005
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0002
• https://roumenpetrov.info/secsh/#news20231220
• https://security-tracker.debian.org/tracker/CVE-2023-48795
• https://security-tracker.debian.org/tracker/source-package/libssh2
• https://github.com/ronf/asyncssh/blob/develop/docs/changes.rst
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KMZCVGUGJZZVDPCVDA7TEB22VUCNEXDD
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L5Y6MNNVAPIJSXJERQ6PKZVCIUXSNJK7
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI3EHAHABFQK7OABNCSF5GMYP6TONTI7
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33XHJUB6ROFUOH2OQNENFROTVH6MHSHA
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3JIMLVBDWOP4FUPXPTB4PGHHIOMGFLQE
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YQLUQWLIHDB5QCXQEX7HXHAWMOKPP5O
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6Y74KVCPEPT4MVU3LHDWCNNOXOE5ZLUR
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APYIXIQOVDCRWLHTGB4VYMAUIAQLKYJ3
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C3AFMZ6MH2UHHOPIWT5YLSFV3D2VB3AC
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HYEDEXIKFKTUJIN43RG4B7T5ZS6MHUSP
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I724O3LSRCPO4WNVIXTZCT4VVRMXMMSG
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L5Y6MNNVAPIJSXJERQ6PKZVCIUXSNJK7
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB
• https://matt.ucc.asn.au/dropbear/CHANGES
• https://nest.pijul.com/pijul/thrussh/changes/D6H7OWTTMHHX6BTB3B6MNBOBX2L66CBL4LGSEUSAI2MCRCJDQFRQC
• https://news.ycombinator.com/item?id=38684904
• https://news.ycombinator.com/item?id=38685286
• https://www.vicarius.io/vsociety/posts/cve-2023-48795-mitigate-openssh-vulnerability
• https://www.vicarius.io/vsociety/posts/cve-2023-48795-detect-openssh-vulnerabilit
• https://www.vandyke.com/products/securecrt/history.txt
• https://www.theregister.com/2023/12/20/terrapin_attack_ssh
• https://www.terrapin-attack.com
• https://www.suse.com/c/suse-addresses-the-ssh-v2-protocol-terrapin-attack-aka-cve-2023-48795
• https://www.reddit.com/r/sysadmin/comments/18idv52/cve202348795_why_is_this_cve_still_undisclosed
• https://www.paramiko.org/changelog.html
• https://www.openwall.com/lists/oss-security/2023/12/20/3
• https://www.openwall.com/lists/oss-security/2023/12/18/2
• https://www.openssh.com/txt/release-9.6
• https://www.openssh.com/openbsd.html
• https://www.netsarang.com/en/xshell-update-history
• https://www.lancom-systems.de/service-support/allgemeine-sicherheitshinweise#c243508
• https://www.freebsd.org/security/advisories/FreeBSD-SA-23:19.openssh.asc
• https://www.debian.org/security/2023/dsa-5588
• https://www.debian.org/security/2023/dsa-5586
• https://www.crushftp.com/crush10wiki/Wiki.jsp?page=Update
• https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
• https://www.bitvise.com/ssh-server-version-history
• https://www.bitvise.com/ssh-client-version-history#933
• https://winscp.net/eng/docs/history#6.2.2
• https://ubuntu.com/security/CVE-2023-48795
• https://twitter.com/TrueSkrillor/status/1736774389725565005
• https://thorntech.com/cve-2023-48795-and-sftp-gateway
• https://support.apple.com/kb/HT214084
• https://security.netapp.com/advisory/ntap-20240105-0004
• https://security.gentoo.org/glsa/202312-17
• https://security.gentoo.org/glsa/202312-16
• https://security-tracker.debian.org/tracker/source-package/trilead-ssh2
• https://security-tracker.debian.org/tracker/source-package/proftpd-dfsg
• https://github.com/rapier1/hpn-ssh/releases
• https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
• https://github.com/proftpd/proftpd/blob/d21e7a2e47e9b38f709bec58e3fa711f759ad0e1/RELEASE_NOTES
• https://github.com/proftpd/proftpd/blob/0a7ea9b0ba9fcdf368374a226370d08f10397d99/RELEASE_NOTES
• https://github.com/openssh/openssh-portable/commits/master
• https://github.com/net-ssh/net-ssh/blob/2e65064a52d73396bfc3806c9196fc8108f33cd8/CHANGES.txt#L14-L16
• https://github.com/mwiede/jsch/compare/jsch-0.2.14...jsch-0.2.15
• https://github.com/mkj/dropbear/blob/17657c36cce6df7716d5ff151ec09a665382d5dd/CHANGES#L25
• https://github.com/erlang/otp/releases/tag/OTP-26.2.1
• https://github.com/erlang/otp/blob/d1b43dc0f1361d2ad67601169e90a7fc50bb0369/lib/ssh/doc/src/notes.xml#L39-L42
• https://github.com/drakkan/sftpgo/releases/tag/v2.5.6
• https://github.com/connectbot/sshlib/compare/2.2.21...2.2.22
• https://github.com/advisories/GHSA-45x7-px36-x8w8
• https://github.com/TeraTermProject/teraterm/releases/tag/v5.1
• https://github.com/PowerShell/Win32-OpenSSH/releases/tag/v9.5.0.0p1-Beta
• https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.10&id=10e09e273f69e149389b3e0e5d44b8c221c2e7f6
• https://forum.netgate.com/topic/184941/terrapin-ssh-attack
• https://filezilla-project.org/versions.php
• https://crates.io/crates/thrussh/versions
• https://cert-portal.siemens.com/productcert/html/ssa-915275.html
• https://cert-portal.siemens.com/productcert/html/ssa-794697.html
• https://cert-portal.siemens.com/productcert/html/ssa-769027.html
• https://cert-portal.siemens.com/productcert/html/ssa-364175.html
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://bugzilla.suse.com/show_bug.cgi?id=1217950
• https://bugzilla.redhat.com/show_bug.cgi?id=2254210
• https://bugs.gentoo.org/920280
• https://arstechnica.com/security/2023/12/hackers-can-break-ssh-channel-integrity-using-novel-data-corruption-attack
• https://access.redhat.com/security/cve/cve-2023-48795
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KEOTKBUPZXHE3F352JBYNTSNRXYLWD6P
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I724O3LSRCPO4WNVIXTZCT4VVRMXMMSG
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HYEDEXIKFKTUJIN43RG4B7T5ZS6MHUSP
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7EYCFQCTSGJXWO3ZZ44MGKFC5HA7G3Y
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHITS4PUOZAKFIUBQAQZC7JWXMOYE4B
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C3AFMZ6MH2UHHOPIWT5YLSFV3D2VB3AC
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL5KTLOSLH2KHRN4HCXJPK3JUVLDGEL6
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APYIXIQOVDCRWLHTGB4VYMAUIAQLKYJ3
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y74KVCPEPT4MVU3LHDWCNNOXOE5ZLUR
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YQLUQWLIHDB5QCXQEX7HXHAWMOKPP5O
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3JIMLVBDWOP4FUPXPTB4PGHHIOMGFLQE
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3CAYYW35MUTNO65RVAELICTNZZFMT2XS
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33XHJUB6ROFUOH2OQNENFROTVH6MHSHA
• https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html
• https://lists.debian.org/debian-lts-announce/2024/11/msg00032.html
• https://lists.debian.org/debian-lts-announce/2024/09/msg00042.html
• https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
• https://lists.debian.org/debian-lts-announce/2024/01/msg00014.html
• https://lists.debian.org/debian-lts-announce/2024/01/msg00013.html
• https://lists.debian.org/debian-lts-announce/2023/12/msg00017.html
• https://jadaptive.com/important-java-ssh-security-update-new-ssh-vulnerability-discovered-cve-2023-48795
• https://help.panic.com/releasenotes/transmit5
• https://groups.google.com/g/golang-announce/c/qA3XtxvMUyg
• https://groups.google.com/g/golang-announce/c/-n5WqVC18LQ
• https://go.dev/issue/64784
• https://go.dev/cl/550715
• https://gitlab.com/libssh/libssh-mirror/-/tags
• https://github.com/warp-tech/russh/releases/tag/v0.40.2
• https://github.com/warp-tech/russh
• https://github.com/ronf/asyncssh/tags
• http://packetstormsecurity.com/files/176280/Terrapin-SSH-Connection-Weakening.html
• http://seclists.org/fulldisclosure/2024/Mar/21
• http://www.openwall.com/lists/oss-security/2023/12/18/3
• http://www.openwall.com/lists/oss-security/2023/12/19/5
• http://www.openwall.com/lists/oss-security/2023/12/20/3
• http://www.openwall.com/lists/oss-security/2024/03/06/3
• http://www.openwall.com/lists/oss-security/2024/04/17/8

CVE-2023-48795 · published 2023-12-18T19:22:09Z · modified 2026-09-10T03:49:59.287342396Z · JSON