Your message dated Sun, 19 Nov 2017 22:47:45 +0000 with message-id <[email protected]> and subject line Bug#873201: fixed in openssh 1:6.7p1-5+deb8u4 has caused the Debian Bug report #873201, regarding openssh-client: command line parsing with -- between option and non-option arguments completely broken to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 873201: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=873201 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: openssh-client Version: 1:7.5p1-7 Severity: grave Tags: upstream security Justification: user security hole Dear Debian maintainer, I was intending to report this upstream, but, contrary to the documentation * [9][email protected] This is a public list and is open to posting from non-subscribed users. on https://www.openssh.com/report.html the upstream mailing list is not open for postings, as I got a rejection message… > Posting by non-members to [email protected] is currently > disabled, sorry. … so please forward this upstream, as is a package maintainer’s duty. Original message follows: -----cutting here may damage your screen surface----- From: Thorsten Glaser <[email protected]> Message-ID: <[email protected]> To: [email protected] Date: Fri, 25 Aug 2017 15:57:47 +0200 (CEST) Subject: command line parsing with -- between option and non-option arguments completely broken Hi, in the process of me fixing CVE-2017-12836 a user noticed a problem with OpenSSH’s command line parsing. I’ve verified these on OpenSSH 5.3 (MirBSD) and 7.5p1 (Debian). So, to begin with, this command _should_ spawn xeyes: $ ssh -oProxyCommand=xeyes vuxu.org This command _could_ spawn xeyes on glibc systems, but probably shouldn’t on POSIX or BSD systems: $ ssh vuxu.org -oProxyCommand=xeyes This command properly does not spawn xeyes but tries to resolve “-oProxyCommand=xeyes” as hostname, correctly failing: $ ssh -- -oProxyCommand=xeyes This command *must not* spawn xeyes, but does: $ ssh -- vuxu.org -oProxyCommand=xeyes This instead must execute “-oProxyCommand=xeyes” as command on the remote side. Interestingly enough, this command works the same and also mustn’t but also doesn’t: $ ssh vuxu.org -- -oProxyCommand=xeyes Now it gets completely weird, this doesn’t spawn xeyes either: $ ssh -- vuxu.org -- -oProxyCommand=xeyes This “should” execute “--” as command with “-oProxyCommand=xeyes” as its first option on the remote site, but judging from the error | mksh: ProxyCommand=xeyes: unknown option it instead passes “-oProxyCommand=xeyes” as option to a shell on the remote side. I don’t do the security theatre, but this could perhaps be considered missing command escaping on the remote side (passing what would be a command as an option to the remote shell) in addition to completely fucked up option parsing on the local side. This was first reported by nickserv-auth’d user jn__ on #musl on Freenode IRC, and leah2 forwarded it to me as current de-facto maintainer of GNU CVS because I considered adding “--” between option and nōn-option arguments sufficient for fixing the afore‐ mentioned CVE, judging this effective enough with normal command line parsing rules (as in getopt(3) on OpenBSD) and given the .Sx SYNOPSIS in the ssh manpage. bye, //mirabilos PS: Please keep me in Cc, I’m not subscribed to the list. -----cutting here may damage your screen surface----- Thanks! PS: This affects cvs in wheezy, jessie and stretch but not sid. -- System Information: Debian Release: buster/sid APT prefers unreleased APT policy: (500, 'unreleased'), (500, 'buildd-unstable'), (500, 'unstable') Architecture: x32 (x86_64) Foreign Architectures: i386, amd64 Kernel: Linux 4.11.0-1-amd64 (SMP w/8 CPU cores) Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8) Shell: /bin/sh linked to /bin/lksh Init: sysvinit (via /sbin/init) Versions of packages openssh-client depends on: ii adduser 3.116 ii dpkg 1.18.24 ii libc6 2.24-14 ii libedit2 3.1-20170329-1 ii libgssapi-krb5-2 1.15.1-2 ii libselinux1 2.6-3+b2 ii libssl1.0.2 1.0.2l-2 ii passwd 1:4.4-4.1 ii zlib1g 1:1.2.8.dfsg-5 Versions of packages openssh-client recommends: ii xauth 1:1.0.9-1 Versions of packages openssh-client suggests: pn keychain <none> ii kwalletcli [ssh-askpass] 3.00-1 pn libpam-ssh <none> pn monkeysphere <none> -- Configuration Files: /etc/ssh/moduli changed [not included] /etc/ssh/ssh_config changed [not included] -- no debconf information
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--- Begin Message ---Source: openssh Source-Version: 1:6.7p1-5+deb8u4 We believe that the bug you reported is fixed in the latest version of openssh, which is due to be installed in the Debian FTP archive. A summary of the changes between this version and the previous one is attached. Thank you for reporting the bug, which will now be closed. If you have further comments please address them to [email protected], and the maintainer will reopen the bug report if appropriate. Debian distribution maintenance software pp. Colin Watson <[email protected]> (supplier of updated openssh package) (This message was generated automatically at their request; if you believe that there is a problem with it please contact the archive administrators by mailing [email protected]) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Format: 1.8 Date: Sat, 18 Nov 2017 10:56:29 +0000 Source: openssh Binary: openssh-client openssh-server openssh-sftp-server ssh ssh-krb5 ssh-askpass-gnome openssh-client-udeb openssh-server-udeb Architecture: source amd64 all Version: 1:6.7p1-5+deb8u4 Distribution: jessie Urgency: medium Maintainer: Debian OpenSSH Maintainers <[email protected]> Changed-By: Colin Watson <[email protected]> Description: openssh-client - secure shell (SSH) client, for secure access to remote machines openssh-client-udeb - secure shell client for the Debian installer (udeb) openssh-server - secure shell (SSH) server, for secure access from remote machines openssh-server-udeb - secure shell server for the Debian installer (udeb) openssh-sftp-server - secure shell (SSH) sftp server module, for SFTP access from remot ssh - secure shell client and server (metapackage) ssh-askpass-gnome - interactive X program to prompt users for a passphrase for ssh-ad ssh-krb5 - secure shell client and server (transitional package) Closes: 865770 873201 Changes: openssh (1:6.7p1-5+deb8u4) jessie; urgency=medium . * Test configuration before starting or reloading sshd under systemd (closes: #865770). * Make "--" before the hostname terminate argument processing after the hostname too (closes: #873201). 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