From patchwork Tue Aug 29 12:09:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Burton X-Patchwork-Id: 29634 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7AAAC83F17 for ; Tue, 29 Aug 2023 12:09:29 +0000 (UTC) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mx.groups.io with SMTP id smtpd.web11.15731.1693310966681590976 for ; Tue, 29 Aug 2023 05:09:26 -0700 Authentication-Results: mx.groups.io; dkim=none (message not signed); spf=pass (domain: arm.com, ip: 217.140.110.172, mailfrom: ross.burton@arm.com) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 05E142F4; Tue, 29 Aug 2023 05:10:05 -0700 (PDT) Received: from oss-tx204.lab.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1A2003F64C; Tue, 29 Aug 2023 05:09:24 -0700 (PDT) From: ross.burton@arm.com To: openembedded-core@lists.openembedded.org Cc: nd@arm.com Subject: [PATCH 1/3] inetutils: fix CVE-2023-40303 Date: Tue, 29 Aug 2023 13:09:21 +0100 Message-Id: <20230829120923.3982702-1-ross.burton@arm.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 29 Aug 2023 12:09:29 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/186857 From: Ross Burton Backport the patch from upstream. Signed-off-by: Ross Burton --- ...rsh-rshd-uucpd-fix-check-set-id-retu.patch | 283 ++++++++++++++++++ .../inetutils/inetutils_2.4.bb | 1 + 2 files changed, 284 insertions(+) create mode 100644 meta/recipes-connectivity/inetutils/inetutils/0001-ftpd-rcp-rlogin-rsh-rshd-uucpd-fix-check-set-id-retu.patch diff --git a/meta/recipes-connectivity/inetutils/inetutils/0001-ftpd-rcp-rlogin-rsh-rshd-uucpd-fix-check-set-id-retu.patch b/meta/recipes-connectivity/inetutils/inetutils/0001-ftpd-rcp-rlogin-rsh-rshd-uucpd-fix-check-set-id-retu.patch new file mode 100644 index 00000000000..42353d147c6 --- /dev/null +++ b/meta/recipes-connectivity/inetutils/inetutils/0001-ftpd-rcp-rlogin-rsh-rshd-uucpd-fix-check-set-id-retu.patch @@ -0,0 +1,283 @@ +From 21a6e7be1935c966d7247bdeb7e2a2cec4b63ba9 Mon Sep 17 00:00:00 2001 +From: Jeffrey Bencteux +Date: Fri, 30 Jun 2023 19:02:45 +0200 +Subject: [PATCH] ftpd,rcp,rlogin,rsh,rshd,uucpd: fix: check set*id() return + values + +Several setuid(), setgid(), seteuid() and setguid() return values +were not checked in ftpd/rcp/rlogin/rsh/rshd/uucpd code potentially +leading to potential security issues. + +Signed-off-by: Jeffrey Bencteux +Signed-off-by: Simon Josefsson + +CVE: CVE-2023-40303 +Upstream-Status: Backport +Signed-off-by: Ross Burton +--- + ftpd/ftpd.c | 10 +++++++--- + src/rcp.c | 39 +++++++++++++++++++++++++++++++++------ + src/rlogin.c | 11 +++++++++-- + src/rsh.c | 25 +++++++++++++++++++++---- + src/rshd.c | 20 +++++++++++++++++--- + src/uucpd.c | 15 +++++++++++++-- + 6 files changed, 100 insertions(+), 20 deletions(-) + +diff --git a/ftpd/ftpd.c b/ftpd/ftpd.c +index 92b2cca5..28dd523f 100644 +--- a/ftpd/ftpd.c ++++ b/ftpd/ftpd.c +@@ -862,7 +862,9 @@ end_login (struct credentials *pcred) + char *remotehost = pcred->remotehost; + int atype = pcred->auth_type; + +- seteuid ((uid_t) 0); ++ if (seteuid ((uid_t) 0) == -1) ++ _exit (EXIT_FAILURE); ++ + if (pcred->logged_in) + { + logwtmp_keep_open (ttyline, "", ""); +@@ -1151,7 +1153,8 @@ getdatasock (const char *mode) + + if (data >= 0) + return fdopen (data, mode); +- seteuid ((uid_t) 0); ++ if (seteuid ((uid_t) 0) == -1) ++ _exit (EXIT_FAILURE); + s = socket (ctrl_addr.ss_family, SOCK_STREAM, 0); + if (s < 0) + goto bad; +@@ -1978,7 +1981,8 @@ passive (int epsv, int af) + else /* !AF_INET6 */ + ((struct sockaddr_in *) &pasv_addr)->sin_port = 0; + +- seteuid ((uid_t) 0); ++ if (seteuid ((uid_t) 0) == -1) ++ _exit (EXIT_FAILURE); + if (bind (pdata, (struct sockaddr *) &pasv_addr, pasv_addrlen) < 0) + { + if (seteuid ((uid_t) cred.uid)) +diff --git a/src/rcp.c b/src/rcp.c +index 75adb253..cdcf8500 100644 +--- a/src/rcp.c ++++ b/src/rcp.c +@@ -345,14 +345,23 @@ main (int argc, char *argv[]) + if (from_option) + { /* Follow "protocol", send data. */ + response (); +- setuid (userid); ++ ++ if (setuid (userid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (setuid() failed)"); ++ } ++ + source (argc, argv); + exit (errs); + } + + if (to_option) + { /* Receive data. */ +- setuid (userid); ++ if (setuid (userid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (setuid() failed)"); ++ } ++ + sink (argc, argv); + exit (errs); + } +@@ -537,7 +546,11 @@ toremote (char *targ, int argc, char *argv[]) + if (response () < 0) + exit (EXIT_FAILURE); + free (bp); +- setuid (userid); ++ ++ if (setuid (userid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (setuid() failed)"); ++ } + } + source (1, argv + i); + close (rem); +@@ -630,7 +643,12 @@ tolocal (int argc, char *argv[]) + ++errs; + continue; + } +- seteuid (userid); ++ ++ if (seteuid (userid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (seteuid() failed)"); ++ } ++ + #if defined IP_TOS && defined IPPROTO_IP && defined IPTOS_THROUGHPUT + sslen = sizeof (ss); + (void) getpeername (rem, (struct sockaddr *) &ss, &sslen); +@@ -643,7 +661,12 @@ tolocal (int argc, char *argv[]) + #endif + vect[0] = target; + sink (1, vect); +- seteuid (effuid); ++ ++ if (seteuid (effuid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (seteuid() failed)"); ++ } ++ + close (rem); + rem = -1; + #ifdef SHISHI +@@ -1441,7 +1464,11 @@ susystem (char *s, int userid) + return (127); + + case 0: +- setuid (userid); ++ if (setuid (userid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (setuid() failed)"); ++ } ++ + execl (PATH_BSHELL, "sh", "-c", s, NULL); + _exit (127); + } +diff --git a/src/rlogin.c b/src/rlogin.c +index aa6426fb..c543de0c 100644 +--- a/src/rlogin.c ++++ b/src/rlogin.c +@@ -647,8 +647,15 @@ try_connect: + /* Now change to the real user ID. We have to be set-user-ID root + to get the privileged port that rcmd () uses. We now want, however, + to run as the real user who invoked us. */ +- seteuid (uid); +- setuid (uid); ++ if (seteuid (uid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (seteuid() failed)"); ++ } ++ ++ if (setuid (uid) == -1) ++ { ++ error (EXIT_FAILURE, 0, "Could not drop privileges (setuid() failed)"); ++ } + + doit (&osmask); /* The old mask will activate SIGURG and SIGUSR1! */ + +diff --git a/src/rsh.c b/src/rsh.c +index 2d622ca4..6f60667d 100644 +--- a/src/rsh.c ++++ b/src/rsh.c +@@ -276,8 +276,17 @@ main (int argc, char **argv) + { + if (asrsh) + *argv = (char *) "rlogin"; +- seteuid (getuid ()); +- setuid (getuid ()); ++ ++ if (seteuid (getuid ()) == -1) ++ { ++ error (EXIT_FAILURE, errno, "seteuid() failed"); ++ } ++ ++ if (setuid (getuid ()) == -1) ++ { ++ error (EXIT_FAILURE, errno, "setuid() failed"); ++ } ++ + execv (PATH_RLOGIN, argv); + error (EXIT_FAILURE, errno, "cannot execute %s", PATH_RLOGIN); + } +@@ -541,8 +550,16 @@ try_connect: + error (0, errno, "setsockopt DEBUG (ignored)"); + } + +- seteuid (uid); +- setuid (uid); ++ if (seteuid (uid) == -1) ++ { ++ error (EXIT_FAILURE, errno, "seteuid() failed"); ++ } ++ ++ if (setuid (uid) == -1) ++ { ++ error (EXIT_FAILURE, errno, "setuid() failed"); ++ } ++ + #ifdef HAVE_SIGACTION + sigemptyset (&sigs); + sigaddset (&sigs, SIGINT); +diff --git a/src/rshd.c b/src/rshd.c +index d1c0d0cd..707790e7 100644 +--- a/src/rshd.c ++++ b/src/rshd.c +@@ -1847,8 +1847,18 @@ doit (int sockfd, struct sockaddr *fromp, socklen_t fromlen) + pwd->pw_shell = PATH_BSHELL; + + /* Set the gid, then uid to become the user specified by "locuser" */ +- setegid ((gid_t) pwd->pw_gid); +- setgid ((gid_t) pwd->pw_gid); ++ if (setegid ((gid_t) pwd->pw_gid) == -1) ++ { ++ rshd_error ("Cannot drop privileges (setegid() failed)\n"); ++ exit (EXIT_FAILURE); ++ } ++ ++ if (setgid ((gid_t) pwd->pw_gid) == -1) ++ { ++ rshd_error ("Cannot drop privileges (setgid() failed)\n"); ++ exit (EXIT_FAILURE); ++ } ++ + #ifdef HAVE_INITGROUPS + initgroups (pwd->pw_name, pwd->pw_gid); /* BSD groups */ + #endif +@@ -1870,7 +1880,11 @@ doit (int sockfd, struct sockaddr *fromp, socklen_t fromlen) + } + #endif /* WITH_PAM */ + +- setuid ((uid_t) pwd->pw_uid); ++ if (setuid ((uid_t) pwd->pw_uid) == -1) ++ { ++ rshd_error ("Cannot drop privileges (setuid() failed)\n"); ++ exit (EXIT_FAILURE); ++ } + + /* We'll execute the client's command in the home directory + * of locuser. Note, that the chdir must be executed after +diff --git a/src/uucpd.c b/src/uucpd.c +index 107589e1..29cfce35 100644 +--- a/src/uucpd.c ++++ b/src/uucpd.c +@@ -252,7 +252,12 @@ doit (struct sockaddr *sap, socklen_t salen) + snprintf (Username, sizeof (Username), "USER=%s", user); + snprintf (Logname, sizeof (Logname), "LOGNAME=%s", user); + dologin (pw, sap, salen); +- setgid (pw->pw_gid); ++ ++ if (setgid (pw->pw_gid) == -1) ++ { ++ fprintf (stderr, "setgid() failed"); ++ return; ++ } + #ifdef HAVE_INITGROUPS + initgroups (pw->pw_name, pw->pw_gid); + #endif +@@ -261,7 +266,13 @@ doit (struct sockaddr *sap, socklen_t salen) + fprintf (stderr, "Login incorrect."); + return; + } +- setuid (pw->pw_uid); ++ ++ if (setuid (pw->pw_uid) == -1) ++ { ++ fprintf (stderr, "setuid() failed"); ++ return; ++ } ++ + execl (uucico_location, "uucico", NULL); + perror ("uucico server: execl"); + } +-- +2.34.1 + diff --git a/meta/recipes-connectivity/inetutils/inetutils_2.4.bb b/meta/recipes-connectivity/inetutils/inetutils_2.4.bb index bcc3a0258e6..9b4c98d63cc 100644 --- a/meta/recipes-connectivity/inetutils/inetutils_2.4.bb +++ b/meta/recipes-connectivity/inetutils/inetutils_2.4.bb @@ -22,6 +22,7 @@ SRC_URI = "${GNU_MIRROR}/inetutils/inetutils-${PV}.tar.xz \ file://tftpd.xinetd.inetutils \ file://inetutils-1.9-PATH_PROCNET_DEV.patch \ file://inetutils-only-check-pam_appl.h-when-pam-enabled.patch \ + file://0001-ftpd-rcp-rlogin-rsh-rshd-uucpd-fix-check-set-id-retu.patch \ " inherit autotools gettext update-alternatives texinfo