From: Archana Polampalli <archana.polampa...@windriver.com> In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.
References: https://nvd.nist.gov/vuln/detail/CVE-2023-51384 Upstream patches: https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754b Signed-off-by: Archana Polampalli <archana.polampa...@windriver.com> --- .../openssh/openssh/CVE-2023-51384.patch | 171 ++++++++++++++++++ .../openssh/openssh_8.9p1.bb | 1 + 2 files changed, 172 insertions(+) create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2023-51384.patch diff --git a/meta/recipes-connectivity/openssh/openssh/CVE-2023-51384.patch b/meta/recipes-connectivity/openssh/openssh/CVE-2023-51384.patch new file mode 100644 index 0000000000..ead3256915 --- /dev/null +++ b/meta/recipes-connectivity/openssh/openssh/CVE-2023-51384.patch @@ -0,0 +1,171 @@ +From 881d9c6af9da4257c69c327c4e2f1508b2fa754b Mon Sep 17 00:00:00 2001 +From: "d...@openbsd.org" <d...@openbsd.org> +Date: Mon, 18 Dec 2023 14:46:12 +0000 +Subject: [PATCH] upstream: apply destination constraints to all p11 keys + +Previously applied only to the first key returned from each token. + +ok markus@ + +OpenBSD-Commit-ID: 36df3afb8eb94eec6b2541f063d0d164ef8b488d + +CVE: CVE-2023-51384 + +Upstream-Status: Backport +https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754b + +Signed-off-by: Archana Polampalli <archana.polampa...@windriver.com> +--- + ssh-agent.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++--- + 1 file changed, 98 insertions(+), 4 deletions(-) + +diff --git a/ssh-agent.c b/ssh-agent.c +index 19eeaae..4dbb4f3 100644 +--- a/ssh-agent.c ++++ b/ssh-agent.c +@@ -249,6 +249,90 @@ free_dest_constraints(struct dest_constraint *dcs, size_t ndcs) + free(dcs); + } + ++static void ++dup_dest_constraint_hop(const struct dest_constraint_hop *dch, ++ struct dest_constraint_hop *out) ++{ ++ u_int i; ++ int r; ++ ++ out->user = dch->user == NULL ? NULL : xstrdup(dch->user); ++ out->hostname = dch->hostname == NULL ? NULL : xstrdup(dch->hostname); ++ out->is_ca = dch->is_ca; ++ out->nkeys = dch->nkeys; ++ out->keys = out->nkeys == 0 ? NULL : ++ xcalloc(out->nkeys, sizeof(*out->keys)); ++ out->key_is_ca = out->nkeys == 0 ? NULL : ++ xcalloc(out->nkeys, sizeof(*out->key_is_ca)); ++ for (i = 0; i < dch->nkeys; i++) { ++ if (dch->keys[i] != NULL && ++ (r = sshkey_from_private(dch->keys[i], ++ &(out->keys[i]))) != 0) ++ fatal_fr(r, "copy key"); ++ out->key_is_ca[i] = dch->key_is_ca[i]; ++ } ++} ++ ++static struct dest_constraint * ++dup_dest_constraints(const struct dest_constraint *dcs, size_t ndcs) ++{ ++ size_t i; ++ struct dest_constraint *ret; ++ ++ if (ndcs == 0) ++ return NULL; ++ ret = xcalloc(ndcs, sizeof(*ret)); ++ for (i = 0; i < ndcs; i++) { ++ dup_dest_constraint_hop(&dcs[i].from, &ret[i].from); ++ dup_dest_constraint_hop(&dcs[i].to, &ret[i].to); ++ } ++ return ret; ++} ++ ++#ifdef DEBUG_CONSTRAINTS ++static void ++dump_dest_constraint_hop(const struct dest_constraint_hop *dch) ++{ ++ u_int i; ++ char *fp; ++ ++ debug_f("user %s hostname %s is_ca %d nkeys %u", ++ dch->user == NULL ? "(null)" : dch->user, ++ dch->hostname == NULL ? "(null)" : dch->hostname, ++ dch->is_ca, dch->nkeys); ++ for (i = 0; i < dch->nkeys; i++) { ++ fp = NULL; ++ if (dch->keys[i] != NULL && ++ (fp = sshkey_fingerprint(dch->keys[i], ++ SSH_FP_HASH_DEFAULT, SSH_FP_DEFAULT)) == NULL) ++ fatal_f("fingerprint failed"); ++ debug_f("key %u/%u: %s%s%s key_is_ca %d", i, dch->nkeys, ++ dch->keys[i] == NULL ? "" : sshkey_ssh_name(dch->keys[i]), ++ dch->keys[i] == NULL ? "" : " ", ++ dch->keys[i] == NULL ? "none" : fp, ++ dch->key_is_ca[i]); ++ free(fp); ++ } ++} ++#endif /* DEBUG_CONSTRAINTS */ ++ ++static void ++dump_dest_constraints(const char *context, ++ const struct dest_constraint *dcs, size_t ndcs) ++{ ++#ifdef DEBUG_CONSTRAINTS ++ size_t i; ++ ++ debug_f("%s: %zu constraints", context, ndcs); ++ for (i = 0; i < ndcs; i++) { ++ debug_f("constraint %zu / %zu: from: ", i, ndcs); ++ dump_dest_constraint_hop(&dcs[i].from); ++ debug_f("constraint %zu / %zu: to: ", i, ndcs); ++ dump_dest_constraint_hop(&dcs[i].to); ++ } ++ debug_f("done for %s", context); ++#endif /* DEBUG_CONSTRAINTS */ ++} + static void + free_identity(Identity *id) + { +@@ -520,13 +604,22 @@ process_request_identities(SocketEntry *e) + Identity *id; + struct sshbuf *msg, *keys; + int r; +- u_int nentries = 0; ++ u_int i = 0, nentries = 0; ++ char *fp; + + debug2_f("entering"); + + if ((msg = sshbuf_new()) == NULL || (keys = sshbuf_new()) == NULL) + fatal_f("sshbuf_new failed"); + TAILQ_FOREACH(id, &idtab->idlist, next) { ++ if ((fp = sshkey_fingerprint(id->key, SSH_FP_HASH_DEFAULT, ++ SSH_FP_DEFAULT)) == NULL) ++ fatal_f("fingerprint failed"); ++ debug_f("key %u / %u: %s %s", i++, idtab->nentries, ++ sshkey_ssh_name(id->key), fp); ++ dump_dest_constraints(__func__, ++ id->dest_constraints, id->ndest_constraints); ++ free(fp); + /* identity not visible, don't include in response */ + if (identity_permitted(id, e, NULL, NULL, NULL) != 0) + continue; +@@ -1235,6 +1328,7 @@ process_add_identity(SocketEntry *e) + sshbuf_reset(e->request); + goto out; + } ++ dump_dest_constraints(__func__, dest_constraints, ndest_constraints); + + if (sk_provider != NULL) { + if (!sshkey_is_sk(k)) { +@@ -1414,6 +1508,7 @@ process_add_smartcard_key(SocketEntry *e) + error_f("failed to parse constraints"); + goto send; + } ++ dump_dest_constraints(__func__, dest_constraints, ndest_constraints); + if (e->nsession_ids != 0 && !remote_add_provider) { + verbose("failed PKCS#11 add of \"%.100s\": remote addition of " + "providers is disabled", provider); +@@ -1449,10 +1544,9 @@ process_add_smartcard_key(SocketEntry *e) + } + id->death = death; + id->confirm = confirm; +- id->dest_constraints = dest_constraints; ++ id->dest_constraints = dup_dest_constraints( ++ dest_constraints, ndest_constraints); + id->ndest_constraints = ndest_constraints; +- dest_constraints = NULL; /* transferred */ +- ndest_constraints = 0; + TAILQ_INSERT_TAIL(&idtab->idlist, id, next); + idtab->nentries++; + success = 1; +-- +2.40.0 diff --git a/meta/recipes-connectivity/openssh/openssh_8.9p1.bb b/meta/recipes-connectivity/openssh/openssh_8.9p1.bb index 7ad9bced1b..3860899540 100644 --- a/meta/recipes-connectivity/openssh/openssh_8.9p1.bb +++ b/meta/recipes-connectivity/openssh/openssh_8.9p1.bb @@ -34,6 +34,7 @@ SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar file://CVE-2023-38408-0004.patch \ file://fix-authorized-principals-command.patch \ file://CVE-2023-48795.patch \ + file://CVE-2023-51384.patch \ " SRC_URI[sha256sum] = "fd497654b7ab1686dac672fb83dfb4ba4096e8b5ffcdaccd262380ae58bec5e7" -- 2.40.0
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#192974): https://lists.openembedded.org/g/openembedded-core/message/192974 Mute This Topic: https://lists.openembedded.org/mt/103397335/21656 Group Owner: openembedded-core+ow...@lists.openembedded.org Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
