Marcus Meissner
3f6eda5c88
* No changes for askpass, see main package changelog for details. - Update to openssh 9.9p1: = Future deprecation notice * OpenSSH plans to remove support for the DSA signature algorithm in early 2025. This release disables DSA by default at compile time. DSA, as specified in the SSHv2 protocol, is inherently weak - being limited to a 160 bit private key and use of the SHA1 digest. Its estimated security level is only 80 bits symmetric equivalent. OpenSSH has disabled DSA keys by default since 2015 but has retained run-time optional support for them. DSA was the only mandatory-to-implement algorithm in the SSHv2 RFCs, mostly because alternative algorithms were encumbered by patents when the SSHv2 protocol was specified. This has not been the case for decades at this point and better algorithms are well supported by all actively-maintained SSH implementations. We do not consider the costs of maintaining DSA in OpenSSH to be justified and hope that removing it from OpenSSH can accelerate its wider deprecation in supporting cryptography libraries. = Potentially-incompatible changes * ssh(1): remove support for pre-authentication compression. OpenSSH has only supported post-authentication compression in the server for some years. Compression before authentication significantly increases the attack surface of SSH servers and risks creating oracles that reveal information about information sent during authentication. OBS-URL: https://build.opensuse.org/package/show/network/openssh?expand=0&rev=275
120 lines
3.1 KiB
Diff
120 lines
3.1 KiB
Diff
Index: openssh-9.6p1/openbsd-compat/port-linux-sshd.c
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===================================================================
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--- openssh-9.6p1.orig/openbsd-compat/port-linux-sshd.c
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+++ openssh-9.6p1/openbsd-compat/port-linux-sshd.c
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@@ -33,6 +33,7 @@
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#include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
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#include "servconf.h"
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#include "port-linux.h"
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+#include "misc.h"
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#include "sshkey.h"
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#include "hostfile.h"
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#include "auth.h"
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@@ -451,7 +452,7 @@ sshd_selinux_setup_exec_context(char *pw
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void
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sshd_selinux_copy_context(void)
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{
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- security_context_t *ctx;
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+ char *ctx;
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if (!sshd_selinux_enabled())
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return;
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@@ -470,6 +471,72 @@ sshd_selinux_copy_context(void)
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}
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}
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+void
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+sshd_selinux_change_privsep_preauth_context(void)
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+{
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+ int len;
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+ char line[1024], *preauth_context = NULL, *cp, *arg;
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+ const char *contexts_path;
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+ FILE *contexts_file;
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+ struct stat sb;
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+
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+ contexts_path = selinux_openssh_contexts_path();
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+ if (contexts_path == NULL) {
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+ debug3_f("Failed to get the path to SELinux context");
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+ return;
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+ }
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+
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+ if ((contexts_file = fopen(contexts_path, "r")) == NULL) {
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+ debug_f("Failed to open SELinux context file");
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+ return;
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+ }
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+
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+ if (fstat(fileno(contexts_file), &sb) != 0 ||
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+ sb.st_uid != 0 || (sb.st_mode & 022) != 0) {
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+ logit_f("SELinux context file needs to be owned by root"
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+ " and not writable by anyone else");
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+ fclose(contexts_file);
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+ return;
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+ }
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+
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+ while (fgets(line, sizeof(line), contexts_file)) {
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+ /* Strip trailing whitespace */
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+ for (len = strlen(line) - 1; len > 0; len--) {
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+ if (strchr(" \t\r\n", line[len]) == NULL)
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+ break;
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+ line[len] = '\0';
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+ }
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+
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+ if (line[0] == '\0')
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+ continue;
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+
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+ cp = line;
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+ arg = strdelim(&cp);
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+ if (arg && *arg == '\0')
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+ arg = strdelim(&cp);
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+
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+ if (arg && strcmp(arg, "privsep_preauth") == 0) {
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+ arg = strdelim(&cp);
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+ if (!arg || *arg == '\0') {
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+ debug_f("privsep_preauth is empty");
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+ fclose(contexts_file);
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+ return;
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+ }
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+ preauth_context = xstrdup(arg);
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+ }
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+ }
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+ fclose(contexts_file);
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+
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+ if (preauth_context == NULL) {
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+ debug_f("Unable to find 'privsep_preauth' option in"
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+ " SELinux context file");
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+ return;
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+ }
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+
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+ ssh_selinux_change_context(preauth_context);
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+ free(preauth_context);
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+}
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+
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#endif
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#endif
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Index: openssh-9.6p1/openbsd-compat/port-linux.h
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===================================================================
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--- openssh-9.6p1.orig/openbsd-compat/port-linux.h
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+++ openssh-9.6p1/openbsd-compat/port-linux.h
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@@ -27,6 +27,7 @@ int sshd_selinux_enabled(void);
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void sshd_selinux_copy_context(void);
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void sshd_selinux_setup_exec_context(char *);
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int sshd_selinux_setup_env_variables(void);
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+void sshd_selinux_change_privsep_preauth_context(void);
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#endif
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#ifdef LINUX_OOM_ADJUST
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Index: openssh-9.6p1/sshd-session.c
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===================================================================
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--- openssh-9.6p1.orig/sshd-session.c
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+++ openssh-9.6p1/sshd-session.c
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@@ -511,7 +511,7 @@ privsep_preauth_child(struct ssh *ssh)
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demote_sensitive_data(ssh);
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#ifdef WITH_SELINUX
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- ssh_selinux_change_context("sshd_net_t");
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+ sshd_selinux_change_privsep_preauth_context();
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#endif
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/* Demote the child */
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