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- properly restore euid in case connect to the ssh-agent socket fails

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Jan F 2010-11-24 07:49:04 +01:00
parent d2ed53bfc6
commit bb5eb00d2d
2 changed files with 31 additions and 28 deletions
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6
openssh.spec
View File

@ -73,7 +73,7 @@
%define openssh_ver 5.6p1 %define openssh_ver 5.6p1
%define openssh_rel 19 %define openssh_rel 19
%define pam_ssh_agent_ver 0.9.2 %define pam_ssh_agent_ver 0.9.2
%define pam_ssh_agent_rel 28 %define pam_ssh_agent_rel 29
Summary: An open source implementation of SSH protocol versions 1 and 2 Summary: An open source implementation of SSH protocol versions 1 and 2
Name: openssh Name: openssh
@ -591,9 +591,11 @@ fi
%endif %endif
%changelog %changelog
* Wed Nov 24 2010 Jan F. Chadima <jchadima@redhat.com> - 5.6p1-19 + 0.9.2-29
- properly restore euid in case connect to the ssh-agent socket fails
* Mon Nov 22 2010 Jan F. Chadima <jchadima@redhat.com> - 5.6p1-19 + 0.9.2-28 * Mon Nov 22 2010 Jan F. Chadima <jchadima@redhat.com> - 5.6p1-19 + 0.9.2-28
- striped read permissions from suid and sgid binaries - striped read permissions from suid and sgid binaries
- properly restore euid in case connect to the ssh-agent socket fails
* Mon Nov 15 2010 Jan F. Chadima <jchadima@redhat.com> - 5.6p1-18 + 0.9.2-27 * Mon Nov 15 2010 Jan F. Chadima <jchadima@redhat.com> - 5.6p1-18 + 0.9.2-27
- used upstream version of the biguid patch - used upstream version of the biguid patch

53
pam_ssh_agent_auth-0.9.2-seteuid.patch
View File

@ -1,26 +1,27 @@
diff -up pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c.seteuid pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c diff -up pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c.seteuid pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c
--- pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c.seteuid 2010-09-08 08:54:29.000000000 +0200 --- pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c.seteuid 2010-09-08 08:54:29.000000000 +0200
+++ pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c 2010-11-22 08:38:05.000000000 +0100 +++ pam_ssh_agent_auth-0.9.2/iterate_ssh_agent_keys.c 2010-11-22 08:38:05.000000000 +0100
@@ -131,13 +131,17 @@ ssh_get_authentication_socket_for_uid(ui @@ -131,13 +131,18 @@ ssh_get_authentication_socket_for_uid(ui
} }
errno = 0; errno = 0;
- seteuid(uid); /* To ensure a race condition is not used to circumvent the stat - seteuid(uid); /* To ensure a race condition is not used to circumvent the stat
- above, we will temporarily drop UID to the caller */ - above, we will temporarily drop UID to the caller */
+ /* To ensure a race condition is not used to circumvent the stat + /* To ensure a race condition is not used to circumvent the stat
+ above, we will temporarily drop UID to the caller */ + above, we will temporarily drop UID to the caller */
+ if (seteuid(uid) == -1) { + if (seteuid(uid) == -1) {
+ error("seteuid(%lu) failed", (unsigned long) uid); + close(sock);
+ return -1; + error("seteuid(%lu) failed", (unsigned long) uid);
+ } + return -1;
if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) { + }
close(sock); if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) {
- if(errno == EACCES) close(sock);
- fatal("MAJOR SECURITY WARNING: uid %lu made a deliberate and malicious attempt to open an agent socket owned by another user", (unsigned long) uid); - if(errno == EACCES)
- return -1; - fatal("MAJOR SECURITY WARNING: uid %lu made a deliberate and malicious attempt to open an agent socket owned by another user", (unsigned long) uid);
+ sock = -1; - return -1;
+ if(errno == EACCES) + sock = -1;
+ fatal("MAJOR SECURITY WARNING: uid %lu made a deliberate and malicious attempt to open an agent socket owned by another user", (unsigned long) uid); + if(errno == EACCES)
} + fatal("MAJOR SECURITY WARNING: uid %lu made a deliberate and malicious attempt to open an agent socket owned by another user", (unsigned long) uid);
}
seteuid(0); /* we now continue the regularly scheduled programming */
seteuid(0); /* we now continue the regularly scheduled programming */