diff options
Diffstat (limited to 'meta-networking/recipes-support/open-vm-tools/open-vm-tools/CVE-2023-34058.patch')
-rw-r--r-- | meta-networking/recipes-support/open-vm-tools/open-vm-tools/CVE-2023-34058.patch | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/meta-networking/recipes-support/open-vm-tools/open-vm-tools/CVE-2023-34058.patch b/meta-networking/recipes-support/open-vm-tools/open-vm-tools/CVE-2023-34058.patch new file mode 100644 index 0000000000..d24dd3695c --- /dev/null +++ b/meta-networking/recipes-support/open-vm-tools/open-vm-tools/CVE-2023-34058.patch @@ -0,0 +1,241 @@ +From 6822b5a84f8cfa60d46479d6b8f1c63eb85eac87 Mon Sep 17 00:00:00 2001 +From: John Wolfe <jwolfe@vmware.com> +Date: Wed, 18 Oct 2023 09:04:07 -0700 +Subject: [PATCH] Address CVE-2023-34058 + +VGAuth: don't accept tokens with unrelated certs. + +CVE: CVE-2023-34058 + +Upstream-Status: Backport [https://github.com/vmware/open-vm-tools/commit/e5be40b9cc025d03ccd5689ef9192d29abd68bfe] + +Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com> +--- + open-vm-tools/vgauth/common/certverify.c | 145 ++++++++++++++++++ + open-vm-tools/vgauth/common/certverify.h | 4 + + open-vm-tools/vgauth/common/prefs.h | 2 + + .../vgauth/serviceImpl/saml-xmlsec1.c | 14 ++ + 4 files changed, 165 insertions(+) + +diff --git a/open-vm-tools/vgauth/common/certverify.c b/open-vm-tools/vgauth/common/certverify.c +index edf54928..29b12df3 100644 +--- a/open-vm-tools/vgauth/common/certverify.c ++++ b/open-vm-tools/vgauth/common/certverify.c +@@ -893,3 +893,148 @@ done: + + return err; + } ++ ++ ++/* ++ * Finds a cert with a subject (if checkSubj is set) or issuer (if ++ * checkSUbj is unset), matching 'val' in the list ++ * of certs. Returns a match or NULL. ++ */ ++ ++static X509 * ++FindCert(GList *cList, ++ X509_NAME *val, ++ int checkSubj) ++{ ++ GList *l; ++ X509 *c; ++ X509_NAME *v; ++ ++ l = cList; ++ while (l != NULL) { ++ c = (X509 *) l->data; ++ if (checkSubj) { ++ v = X509_get_subject_name(c); ++ } else { ++ v = X509_get_issuer_name(c); ++ } ++ if (X509_NAME_cmp(val, v) == 0) { ++ return c; ++ } ++ l = l->next; ++ } ++ return NULL; ++} ++ ++ ++/* ++ ****************************************************************************** ++ * CertVerify_CheckForUnrelatedCerts -- */ /** ++ * ++ * Looks over a list of certs. If it finds that they are not all ++ * part of the same chain, returns failure. ++ * ++ * @param[in] numCerts The number of certs in the chain. ++ * @param[in] pemCerts The chain of certificates to verify. ++ * ++ * @return VGAUTH_E_OK on success, VGAUTH_E_FAIL if unrelated certs are found. ++ * ++ ****************************************************************************** ++ */ ++ ++VGAuthError ++CertVerify_CheckForUnrelatedCerts(int numCerts, ++ const char **pemCerts) ++{ ++ VGAuthError err = VGAUTH_E_FAIL; ++ int chainLen = 0; ++ int i; ++ X509 **certs = NULL; ++ GList *rawList = NULL; ++ X509 *baseCert; ++ X509 *curCert; ++ X509_NAME *subject; ++ X509_NAME *issuer; ++ ++ /* common single cert case; nothing to do */ ++ if (numCerts == 1) { ++ return VGAUTH_E_OK; ++ } ++ ++ /* convert all PEM to X509 objects */ ++ certs = g_malloc0(numCerts * sizeof(X509 *)); ++ for (i = 0; i < numCerts; i++) { ++ certs[i] = CertStringToX509(pemCerts[i]); ++ if (NULL == certs[i]) { ++ g_warning("%s: failed to convert cert to X509\n", __FUNCTION__); ++ goto done; ++ } ++ } ++ ++ /* choose the cert to start the chain. shouldn't matter which */ ++ baseCert = certs[0]; ++ ++ /* put the rest into a list */ ++ for (i = 1; i < numCerts; i++) { ++ rawList = g_list_append(rawList, certs[i]); ++ } ++ ++ /* now chase down to a leaf, looking for certs the baseCert issued */ ++ subject = X509_get_subject_name(baseCert); ++ while ((curCert = FindCert(rawList, subject, 0)) != NULL) { ++ /* pull it from the list */ ++ rawList = g_list_remove(rawList, curCert); ++ /* set up the next find */ ++ subject = X509_get_subject_name(curCert); ++ } ++ ++ /* ++ * walk up to the root cert, by finding a cert where the ++ * issuer equals the subject of the current ++ */ ++ issuer = X509_get_issuer_name(baseCert); ++ while ((curCert = FindCert(rawList, issuer, 1)) != NULL) { ++ /* pull it from the list */ ++ rawList = g_list_remove(rawList, curCert); ++ /* set up the next find */ ++ issuer = X509_get_issuer_name(curCert); ++ } ++ ++ /* ++ * At this point, anything on the list should be certs that are not part ++ * of the chain that includes the original 'baseCert'. ++ * ++ * For a valid token, the list should be empty. ++ */ ++ chainLen = g_list_length(rawList); ++ if (chainLen != 0 ) { ++ GList *l; ++ ++ g_warning("%s: %d unrelated certs found in list\n", ++ __FUNCTION__, chainLen); ++ ++ /* debug helper */ ++ l = rawList; ++ while (l != NULL) { ++ X509* c = (X509 *) l->data; ++ char *s = X509_NAME_oneline(X509_get_subject_name(c), NULL, 0); ++ ++ g_debug("%s: unrelated cert subject: %s\n", __FUNCTION__, s); ++ free(s); ++ l = l->next; ++ } ++ ++ goto done; ++ } ++ ++ g_debug("%s: Success! no unrelated certs found\n", __FUNCTION__); ++ err = VGAUTH_E_OK; ++ ++done: ++ g_list_free(rawList); ++ for (i = 0; i < numCerts; i++) { ++ X509_free(certs[i]); ++ } ++ g_free(certs); ++ return err; ++} +diff --git a/open-vm-tools/vgauth/common/certverify.h b/open-vm-tools/vgauth/common/certverify.h +index d7c6410b..f582bb82 100644 +--- a/open-vm-tools/vgauth/common/certverify.h ++++ b/open-vm-tools/vgauth/common/certverify.h +@@ -67,6 +67,10 @@ VGAuthError CertVerify_CheckSignatureUsingCert(VGAuthHashAlg hash, + size_t signatureLen, + const unsigned char *signature); + ++ ++VGAuthError CertVerify_CheckForUnrelatedCerts(int numCerts, ++ const char **pemCerts); ++ + gchar * CertVerify_StripPEMCert(const gchar *pemCert); + + gchar * CertVerify_CertToX509String(const gchar *pemCert); +diff --git a/open-vm-tools/vgauth/common/prefs.h b/open-vm-tools/vgauth/common/prefs.h +index ff116928..87ccc9b3 100644 +--- a/open-vm-tools/vgauth/common/prefs.h ++++ b/open-vm-tools/vgauth/common/prefs.h +@@ -136,6 +136,8 @@ msgCatalog = /etc/vmware-tools/vgauth/messages + #define VGAUTH_PREF_ALIASSTORE_DIR "aliasStoreDir" + /** The number of seconds slack allowed in either direction in SAML token date checks. */ + #define VGAUTH_PREF_CLOCK_SKEW_SECS "clockSkewAdjustment" ++/** If unrelated certificates are allowed in a SAML token */ ++#define VGAUTH_PREF_ALLOW_UNRELATED_CERTS "allowUnrelatedCerts" + + /** Ticket group name. */ + #define VGAUTH_PREF_GROUP_NAME_TICKET "ticket" +diff --git a/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c b/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c +index aaa5082a..17b56de9 100644 +--- a/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c ++++ b/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c +@@ -47,6 +47,7 @@ + #include "vmxlog.h" + + static int gClockSkewAdjustment = VGAUTH_PREF_DEFAULT_CLOCK_SKEW_SECS; ++static gboolean gAllowUnrelatedCerts = FALSE; + static xmlSchemaPtr gParsedSchemas = NULL; + static xmlSchemaValidCtxtPtr gSchemaValidateCtx = NULL; + +@@ -313,6 +314,10 @@ LoadPrefs(void) + VGAUTH_PREF_DEFAULT_CLOCK_SKEW_SECS); + Log("%s: Allowing %d of clock skew for SAML date validation\n", + __FUNCTION__, gClockSkewAdjustment); ++ gAllowUnrelatedCerts = Pref_GetBool(gPrefs, ++ VGAUTH_PREF_ALLOW_UNRELATED_CERTS, ++ VGAUTH_PREF_GROUP_NAME_SERVICE, ++ FALSE); + } + + +@@ -1526,6 +1531,15 @@ SAML_VerifyBearerTokenAndChain(const char *xmlText, + if (FALSE == bRet) { + return VGAUTH_E_AUTHENTICATION_DENIED; + } ++ if (!gAllowUnrelatedCerts) { ++ err = CertVerify_CheckForUnrelatedCerts(num, (const char **) certChain); ++ if (err != VGAUTH_E_OK) { ++ VMXLog_Log(VMXLOG_LEVEL_WARNING, ++ "Unrelated certs found in SAML token, failing\n"); ++ return VGAUTH_E_AUTHENTICATION_DENIED; ++ } ++ } ++ + + subj.type = SUBJECT_TYPE_NAMED; + subj.name = *subjNameOut; +-- +2.40.0 |