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curl/curl-CVE-2024-7264.patch

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From 3c914bc680155b32178f1f15ca8d47c7f4640afe Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 30 Jul 2024 10:05:17 +0200
Subject: [PATCH] x509asn1: clean up GTime2str
Co-authored-by: Stefan Eissing
Reported-by: Dov Murik
Closes #14307
---
lib/vtls/x509asn1.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
Index: curl-8.6.0/lib/vtls/x509asn1.c
===================================================================
--- curl-8.6.0.orig/lib/vtls/x509asn1.c
+++ curl-8.6.0/lib/vtls/x509asn1.c
@@ -488,7 +488,7 @@ static CURLcode GTime2str(struct dynbuf
/* Convert an ASN.1 Generalized time to a printable string.
Return the dynamically allocated string, or NULL if an error occurs. */
- for(fracp = beg; fracp < end && *fracp >= '0' && *fracp <= '9'; fracp++)
+ for(fracp = beg; fracp < end && ISDIGIT(*fracp); fracp++)
;
/* Get seconds digits. */
@@ -507,32 +507,44 @@ static CURLcode GTime2str(struct dynbuf
return CURLE_BAD_FUNCTION_ARGUMENT;
}
- /* Scan for timezone, measure fractional seconds. */
+ /* timezone follows optional fractional seconds. */
tzp = fracp;
- fracl = 0;
+ fracl = 0; /* no fractional seconds detected so far */
if(fracp < end && (*fracp == '.' || *fracp == ',')) {
- fracp++;
- do
+ /* Have fractional seconds, e.g. "[.,]\d+". How many? */
+ fracp++; /* should be a digit char or BAD ARGUMENT */
+ tzp = fracp;
+ while(tzp < end && ISDIGIT(*tzp))
tzp++;
- while(tzp < end && *tzp >= '0' && *tzp <= '9');
- /* Strip leading zeroes in fractional seconds. */
- for(fracl = tzp - fracp - 1; fracl && fracp[fracl - 1] == '0'; fracl--)
- ;
+ if(tzp == fracp) /* never looped, no digit after [.,] */
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ fracl = tzp - fracp; /* number of fractional sec digits */
+ DEBUGASSERT(fracl > 0);
+ /* Strip trailing zeroes in fractional seconds.
+ * May reduce fracl to 0 if only '0's are present. */
+ while(fracl && fracp[fracl - 1] == '0')
+ fracl--;
}
/* Process timezone. */
- if(tzp >= end)
- ; /* Nothing to do. */
+ if(tzp >= end) {
+ tzp = "";
+ tzl = 0;
+ }
else if(*tzp == 'Z') {
- tzp = " GMT";
- end = tzp + 4;
+ sep = " ";
+ tzp = "GMT";
+ tzl = 3;
+ }
+ else if((*tzp == '+') || (*tzp == '-')) {
+ sep = " UTC";
+ tzl = end - tzp;
}
else {
sep = " ";
- tzp++;
+ tzl = end - tzp;
}
- tzl = end - tzp;
return Curl_dyn_addf(store,
"%.4s-%.2s-%.2s %.2s:%.2s:%c%c%s%.*s%s%.*s",
beg, beg + 4, beg + 6,
@@ -541,6 +553,15 @@ static CURLcode GTime2str(struct dynbuf
sep, (int)tzl, tzp);
}
+#ifdef UNITTESTS
+/* used by unit1656.c */
+CURLcode Curl_x509_GTime2str(struct dynbuf *store,
+ const char *beg, const char *end)
+{
+ return GTime2str(store, beg, end);
+}
+#endif
+
/*
* Convert an ASN.1 UTC time to a printable string.
*
Index: curl-8.6.0/lib/vtls/x509asn1.h
===================================================================
--- curl-8.6.0.orig/lib/vtls/x509asn1.h
+++ curl-8.6.0/lib/vtls/x509asn1.h
@@ -76,5 +76,16 @@ CURLcode Curl_extract_certinfo(struct Cu
const char *beg, const char *end);
CURLcode Curl_verifyhost(struct Curl_cfilter *cf, struct Curl_easy *data,
const char *beg, const char *end);
+
+#ifdef UNITTESTS
+#if defined(USE_GNUTLS) || defined(USE_SCHANNEL) || defined(USE_SECTRANSP) || \
+ defined(USE_MBEDTLS)
+
+/* used by unit1656.c */
+CURLcode Curl_x509_GTime2str(struct dynbuf *store,
+ const char *beg, const char *end);
+#endif
+#endif
+
#endif /* USE_GNUTLS or USE_WOLFSSL or USE_SCHANNEL or USE_SECTRANSP */
#endif /* HEADER_CURL_X509ASN1_H */
Index: curl-8.6.0/tests/data/Makefile.inc
===================================================================
--- curl-8.6.0.orig/tests/data/Makefile.inc
+++ curl-8.6.0/tests/data/Makefile.inc
@@ -208,7 +208,7 @@ test1620 test1621 \
\
test1630 test1631 test1632 test1633 test1634 test1635 \
\
-test1650 test1651 test1652 test1653 test1654 test1655 \
+test1650 test1651 test1652 test1653 test1654 test1655 test1656 \
test1660 test1661 test1662 \
\
test1670 test1671 \
Index: curl-8.6.0/tests/data/test1656
===================================================================
--- /dev/null
+++ curl-8.6.0/tests/data/test1656
@@ -0,0 +1,22 @@
+<testcase>
+<info>
+<keywords>
+unittest
+Curl_x509_GTime2str
+</keywords>
+</info>
+
+#
+# Client-side
+<client>
+<server>
+none
+</server>
+<features>
+unittest
+</features>
+<name>
+Curl_x509_GTime2str unit tests
+</name>
+</client>
+</testcase>
Index: curl-8.6.0/tests/unit/Makefile.inc
===================================================================
--- curl-8.6.0.orig/tests/unit/Makefile.inc
+++ curl-8.6.0/tests/unit/Makefile.inc
@@ -36,7 +36,7 @@ UNITPROGS = unit1300 unit1302 u
unit1600 unit1601 unit1602 unit1603 unit1604 unit1605 unit1606 unit1607 \
unit1608 unit1609 unit1610 unit1611 unit1612 unit1614 \
unit1620 unit1621 \
- unit1650 unit1651 unit1652 unit1653 unit1654 unit1655 \
+ unit1650 unit1651 unit1652 unit1653 unit1654 unit1655 unit1656 \
unit1660 unit1661 \
unit2600 unit2601 unit2602 unit2603 \
unit3200
@@ -117,6 +117,8 @@ unit1654_SOURCES = unit1654.c $(UNITFILE
unit1655_SOURCES = unit1655.c $(UNITFILES)
+unit1656_SOURCES = unit1656.c $(UNITFILES)
+
unit1660_SOURCES = unit1660.c $(UNITFILES)
unit1661_SOURCES = unit1661.c $(UNITFILES)
Index: curl-8.6.0/tests/unit/unit1656.c
===================================================================
--- /dev/null
+++ curl-8.6.0/tests/unit/unit1656.c
@@ -0,0 +1,133 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+#include "curlcheck.h"
+
+#include "vtls/x509asn1.h"
+
+static CURLcode unit_setup(void)
+{
+ return CURLE_OK;
+}
+
+static void unit_stop(void)
+{
+
+}
+
+#if defined(USE_GNUTLS) || defined(USE_SCHANNEL) || defined(USE_SECTRANSP) || \
+ defined(USE_MBEDTLS)
+
+#ifndef ARRAYSIZE
+#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
+#endif
+
+struct test_spec {
+ const char *input;
+ const char *exp_output;
+ CURLcode exp_result;
+};
+
+static struct test_spec test_specs[] = {
+ { "190321134340", "1903-21-13 43:40:00", CURLE_OK },
+ { "", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "WTF", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "0WTF", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "19032113434", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "19032113434WTF", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "190321134340.", NULL, CURLE_BAD_FUNCTION_ARGUMENT },
+ { "190321134340.1", "1903-21-13 43:40:00.1", CURLE_OK },
+ { "19032113434017.0", "1903-21-13 43:40:17", CURLE_OK },
+ { "19032113434017.01", "1903-21-13 43:40:17.01", CURLE_OK },
+ { "19032113434003.001", "1903-21-13 43:40:03.001", CURLE_OK },
+ { "19032113434003.090", "1903-21-13 43:40:03.09", CURLE_OK },
+ { "190321134340Z", "1903-21-13 43:40:00 GMT", CURLE_OK },
+ { "19032113434017.0Z", "1903-21-13 43:40:17 GMT", CURLE_OK },
+ { "19032113434017.01Z", "1903-21-13 43:40:17.01 GMT", CURLE_OK },
+ { "19032113434003.001Z", "1903-21-13 43:40:03.001 GMT", CURLE_OK },
+ { "19032113434003.090Z", "1903-21-13 43:40:03.09 GMT", CURLE_OK },
+ { "190321134340CET", "1903-21-13 43:40:00 CET", CURLE_OK },
+ { "19032113434017.0CET", "1903-21-13 43:40:17 CET", CURLE_OK },
+ { "19032113434017.01CET", "1903-21-13 43:40:17.01 CET", CURLE_OK },
+ { "190321134340+02:30", "1903-21-13 43:40:00 UTC+02:30", CURLE_OK },
+ { "19032113434017.0+02:30", "1903-21-13 43:40:17 UTC+02:30", CURLE_OK },
+ { "19032113434017.01+02:30", "1903-21-13 43:40:17.01 UTC+02:30", CURLE_OK },
+ { "190321134340-3", "1903-21-13 43:40:00 UTC-3", CURLE_OK },
+ { "19032113434017.0-04", "1903-21-13 43:40:17 UTC-04", CURLE_OK },
+ { "19032113434017.01-01:10", "1903-21-13 43:40:17.01 UTC-01:10", CURLE_OK },
+};
+
+static bool do_test(struct test_spec *spec, size_t i, struct dynbuf *dbuf)
+{
+ CURLcode result;
+ const char *in = spec->input;
+
+ Curl_dyn_reset(dbuf);
+ result = Curl_x509_GTime2str(dbuf, in, in + strlen(in));
+ if(result != spec->exp_result) {
+ fprintf(stderr, "test %zu: expect result %d, got %d\n",
+ i, spec->exp_result, result);
+ return FALSE;
+ }
+ else if(!result && strcmp(spec->exp_output, Curl_dyn_ptr(dbuf))) {
+ fprintf(stderr, "test %zu: input '%s', expected output '%s', got '%s'\n",
+ i, in, spec->exp_output, Curl_dyn_ptr(dbuf));
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+UNITTEST_START
+{
+ size_t i;
+ struct dynbuf dbuf;
+ bool all_ok = TRUE;
+
+ Curl_dyn_init(&dbuf, 32*1024);
+
+ if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
+ fprintf(stderr, "curl_global_init() failed\n");
+ return TEST_ERR_MAJOR_BAD;
+ }
+
+ for(i = 0; i < ARRAYSIZE(test_specs); ++i) {
+ if(!do_test(&test_specs[i], i, &dbuf))
+ all_ok = FALSE;
+ }
+ fail_unless(all_ok, "some tests of Curl_x509_GTime2str() fails");
+
+ Curl_dyn_free(&dbuf);
+ curl_global_cleanup();
+}
+UNITTEST_STOP
+
+#else
+
+UNITTEST_START
+{
+ puts("not tested since Curl_x509_GTime2str() is not built-in");
+}
+UNITTEST_STOP
+
+#endif
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