Fix several coverity warnings

290424 Missing break in switch - In hash_match: Missing break
statement between cases in switch statement

290414 Resource leak - In cli_scanishield_msi: Leak of memory or
pointers to system resources. Memory leak in a fail case

288197 Resource leak - In decrypt_any: Leak of memory or pointers
to system resources. Memory leak in a fail case

290426 Resource leak - In cli_magic_scan: Leak of memory or pointers
to system resources. Leaked a file prefix when running with
--save-temps

192923 Resource leak - In cli_scanrar: Leak of memory or pointers to
system resources. Leaked a file descriptor if a virus was found in
a RAR file comment

225146 Resource leak - In cli_scanegg: Leak of memory or pointers
to system resources. Leaked a file descriptor if unable to write
a comment file to disk

290425 Resource leak - In scan_common: Leak of memory or pointers
to system resources. Memory leaks in various fail cases.

Also changes cli_scanrar to write out the file comment only if
--leave-temps is specified and scan the buffer (like what is done
in cli_scanegg) instead of writing the file out, scanning that,
and then deleting the file if --leave-temps is not specified.

The unit tests stopped working when correcting an issue with a
switch statement that determined what type of signature had matched
on a Google SafeBrowsing GDB rule. Looking into the unit tests, it
looks like the code had always assumed that the test cases would be
detected by a malware test rule in unit_tests/input/daily.gdb, but
now some of the tests get matched on the phishing test rule.
I updated the test logic to be more clear, and added tests for both
cases now.

Fix some memory leaks in libclamav/scanners.c

libclamav/ishield.c

@@ -241,7 +241,12 @@ int cli_scanishield_msi(cli_ctx *ctx, off_t off)
 
         /* FIXMEISHIELD: cleanup the spam below */
         cli_dbgmsg("ishield-msi: File %s (csize: %llx, unk1:%x unk2:%x unk3:%x unk4:%x unk5:%x unk6:%x unk7:%x unk8:%x unk9:%x unk10:%x unk11:%x)\n", key, (long long)csize, fb.unk1, fb.unk2, fb.unk3, fb.unk4, fb.unk5, fb.unk6, fb.unk7, fb.unk8, fb.unk9, fb.unk10, fb.unk11);
-        if (!(tempfile = cli_gentemp(ctx->sub_tmpdir))) return CL_EMEM;
+        if (!(tempfile = cli_gentemp(ctx->sub_tmpdir))) {
+            if (NULL != filename) {
+                free(filename);
+            }
+            return CL_EMEM;
+        }
         if ((ofd = open(tempfile, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR)) < 0) {
             cli_dbgmsg("ishield-msi: failed to create file %s\n", tempfile);
             free(tempfile);

libclamav/pdf.c

@@ -1265,6 +1265,7 @@ char *decrypt_any(struct pdf_struct *pdf, uint32_t id, const char *in, size_t *l
             memcpy(q, in, *length);
             if (false == arc4_init(&arc4, result, n)) {
                 noisy_warnmsg("decrypt_any: failed to init arc4\n");
+                free(q);
                 return NULL;
             }
             arc4_apply(&arc4, q, (unsigned)*length); /* TODO: may truncate for very large lengths */
@@ -1281,10 +1282,6 @@ char *decrypt_any(struct pdf_struct *pdf, uint32_t id, const char *in, size_t *l
             break;
         case ENC_AESV3:
             cli_dbgmsg("decrypt_any: enc is aesv3\n");
-            if (pdf->keylen == 0) {
-                cli_dbgmsg("decrypt_any: no key\n");
-                return NULL;
-            }
 
             aes_256cbc_decrypt((const unsigned char *)in, length, q, pdf->key, pdf->keylen, 1);
 

libclamav/phishcheck.c

@@ -1208,10 +1208,13 @@ static cl_error_t hash_match(const struct regex_matcher* rlist,
                     break;
                 case '1':
                     *phishing_verdict = CL_PHISH_HASH1;
+                    break;
                 case '2':
                     *phishing_verdict = CL_PHISH_HASH2;
+                    break;
                 default:
                     *phishing_verdict = CL_PHISH_HASH0;
+                    break;
             }
         }
     }

libclamav/regex_list.c

@@ -472,6 +472,9 @@ cl_error_t load_regex_matcher(struct cl_engine *engine, struct regex_matcher *ma
         if (!*buffer)
             continue; /* skip empty lines */
 
+        if (buffer[0] == '#')
+            continue;
+
         if (functionality_level_check(buffer))
             continue;
 

libclamav/scanners.c

@@ -272,6 +272,8 @@ static cl_error_t cli_scanrar(const char *filepath, int desc, cli_ctx *ctx)
 
     /* If the archive header had a comment, write it to the comment dir. */
     if ((comment != NULL) && (comment_size > 0)) {
+
+        if (ctx->engine->keeptmp) {
             int comment_fd = -1;
             if (!(comment_fullpath = cli_gentemp_with_prefix(ctx->sub_tmpdir, "comments"))) {
                 status = CL_EMEM;
@@ -285,14 +287,13 @@ static cl_error_t cli_scanrar(const char *filepath, int desc, cli_ctx *ctx)
                 cli_dbgmsg("RAR: Writing the archive comment to temp file: %s\n", comment_fullpath);
                 if (0 == write(comment_fd, comment, comment_size)) {
                     cli_dbgmsg("RAR: ERROR: Failed to write to output file\n");
-            } else {
-                /* Scan the comment file */
-                status = cli_magic_scan_file(comment_fullpath, ctx, NULL);
+                }
+                close(comment_fd);
+            }
+        }
 
-                /* Delete the tempfile if not --leave-temps */
-                if (!ctx->engine->keeptmp)
-                    if (cli_unlink(comment_fullpath))
-                        cli_dbgmsg("RAR: Failed to unlink the extracted comment file: %s\n", comment_fullpath);
+        /* Scan the comment */
+        status = cli_magic_scan_buff(comment, comment_size, ctx, NULL);
 
         if ((status == CL_VIRUS) && SCAN_ALLMATCHES) {
             status = CL_CLEAN;
@@ -302,9 +303,6 @@ static cl_error_t cli_scanrar(const char *filepath, int desc, cli_ctx *ctx)
             goto done;
         }
     }
-            close(comment_fd);
-        }
-    }
 
     /*
      * Read & scan each file header.
@@ -657,7 +655,6 @@ static cl_error_t cli_scanegg(cli_ctx *ctx, size_t sfx_offset)
                     goto done;
                 }
                 free(prefix);
-                prefix = NULL;
 
                 comment_fd = open(comment_fullpath, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
                 if (comment_fd < 0) {
@@ -666,10 +663,8 @@ static cl_error_t cli_scanegg(cli_ctx *ctx, size_t sfx_offset)
                     cli_dbgmsg("EGG: Writing the archive comment to temp file: %s\n", comment_fullpath);
                     if (0 == write(comment_fd, comments[i], nComments)) {
                         cli_dbgmsg("EGG: ERROR: Failed to write to output file\n");
-                    } else {
-                        close(comment_fd);
-                        comment_fd = -1;
                     }
+                    close(comment_fd);
                 }
                 free(comment_fullpath);
                 comment_fullpath = NULL;
@@ -3471,7 +3466,6 @@ cl_error_t cli_magic_scan(cli_ctx *ctx, cli_file_t type)
     void *parent_property = NULL;
 #endif
 
-    char *fmap_basename = NULL;
     char *old_temp_path = NULL;
     char *new_temp_path = NULL;
 
@@ -3509,6 +3503,7 @@ cl_error_t cli_magic_scan(cli_ctx *ctx, cli_file_t type)
     }
 
     if (ctx->engine->keeptmp) {
+        char *fmap_basename = NULL;
         /*
          * Keep-temp enabled, so create a sub-directory to provide extraction directory recursion.
          */
@@ -3518,6 +3513,7 @@ cl_error_t cli_magic_scan(cli_ctx *ctx, cli_file_t type)
              * The fmap has a name, lets include it in the new sub-directory.
              */
             new_temp_path = cli_gentemp_with_prefix(ctx->sub_tmpdir, fmap_basename);
+            free(fmap_basename);
             if (NULL == new_temp_path) {
                 cli_errmsg("cli_magic_scan: Failed to generate temp directory name.\n");
                 ret = CL_EMEM;
@@ -4582,6 +4578,7 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
 
     time_t current_time;
     struct tm tm_struct;
+    fmap_t **fmap_head = NULL;
 
     if (NULL == map) {
         return CL_ENULLARG;
@@ -4599,17 +4596,21 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
     memcpy(ctx.options, scanoptions, sizeof(struct cl_scan_options));
     ctx.found_possibly_unwanted = 0;
     ctx.containers              = cli_calloc(sizeof(cli_ctx_container), ctx.engine->maxreclevel + 2);
-    if (!ctx.containers)
-        return CL_EMEM;
+    if (!ctx.containers) {
+        rc = CL_EMEM;
+        goto done;
+    }
     cli_set_container(&ctx, CL_TYPE_ANY, 0);
     ctx.dconf  = (struct cli_dconf *)engine->dconf;
     ctx.cb_ctx = context;
-    ctx.fmap   = cli_calloc(sizeof(fmap_t *), ctx.engine->maxreclevel + 3);
-    if (!ctx.fmap)
-        return CL_EMEM;
+    fmap_head   = cli_calloc(sizeof(fmap_t *), ctx.engine->maxreclevel + 3);
+    if (!fmap_head) {
+        rc = CL_EMEM;
+        goto done;
+    }
     if (!(ctx.hook_lsig_matches = cli_bitset_init())) {
-        free(ctx.fmap);
-        return CL_EMEM;
+        rc = CL_EMEM;
+        goto done;
     }
 
     /*
@@ -4618,7 +4619,7 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
      * fmap's file descriptor in the virus found callback (like for deferred
      * low-seveerity alerts).
      */
-    ctx.fmap++;
+    ctx.fmap = fmap_head + 1;
     *ctx.fmap = map;
 
     perf_init(&ctx);
@@ -4658,7 +4659,8 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
     if (!localtime_r(&current_time, &tm_struct)) {
 #endif
         cli_errmsg("scan_common: Failed to get local time.\n");
-        return CL_ESTAT;
+        rc = CL_ESTAT;
+        goto done;
     }
 
     if ((ctx.engine->keeptmp) &&
@@ -4669,7 +4671,8 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
         new_temp_prefix     = cli_calloc(1, new_temp_prefix_len + 1);
         if (!new_temp_prefix) {
             cli_errmsg("scan_common: Failed to allocate memory for temp directory name.\n");
-            return CL_EMEM;
+            rc = CL_EMEM;
+            goto done;
         }
         strftime(new_temp_prefix, new_temp_prefix_len, "%Y%m%d_%H%M%S-", &tm_struct);
         strcpy(new_temp_prefix + strlen("YYYYMMDD_HHMMSS-"), target_basename);
@@ -4679,7 +4682,8 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
         new_temp_prefix     = cli_calloc(1, new_temp_prefix_len + 1);
         if (!new_temp_prefix) {
             cli_errmsg("scan_common: Failed to allocate memory for temp directory name.\n");
-            return CL_EMEM;
+            rc = CL_EMEM;
+            goto done;
         }
         strftime(new_temp_prefix, new_temp_prefix_len, "%Y%m%d_%H%M%S-scantemp", &tm_struct);
     }
@@ -4689,14 +4693,16 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
     free(new_temp_prefix);
     if (NULL == new_temp_path) {
         cli_errmsg("scan_common: Failed to generate temp directory name.\n");
-        return CL_EMEM;
+        rc = CL_EMEM;
+        goto done;
     }
 
     ctx.sub_tmpdir = new_temp_path;
 
     if (mkdir(ctx.sub_tmpdir, 0700)) {
         cli_errmsg("Can't create temporary directory for scan: %s.\n", ctx.sub_tmpdir);
-        return CL_EACCES;
+        rc = CL_EACCES;
+        goto done;
     }
 
     cli_logg_setup(&ctx);
@@ -4801,6 +4807,9 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
         }
     }
 
+    cli_logg_unsetup();
+
+done:
     if (NULL != ctx.sub_tmpdir) {
         if (!ctx.engine->keeptmp) {
             (void)cli_rmdirs(ctx.sub_tmpdir);
@@ -4808,16 +4817,33 @@ static cl_error_t scan_common(cl_fmap_t *map, const char *filepath, const char *
         free(ctx.sub_tmpdir);
     }
 
+    if (NULL != target_basename) {
+        free(target_basename);
+    }
+
     if (NULL != ctx.target_filepath) {
         free(ctx.target_filepath);
     }
-    free(ctx.containers);
-    cli_bitset_free(ctx.hook_lsig_matches);
-    ctx.fmap--; /* Restore original fmap pointer */
-    free(ctx.fmap);
-    free(ctx.options);
-    cli_logg_unsetup();
+
+    if (NULL != ctx.perf) {
         perf_done(&ctx);
+    }
+
+    if (NULL != ctx.hook_lsig_matches) {
+        cli_bitset_free(ctx.hook_lsig_matches);
+    }
+
+    if (NULL != fmap_head) {
+        free(fmap_head);
+    }
+
+    if (NULL != ctx.containers) {
+        free(ctx.containers);
+    }
+
+    if (NULL != ctx.options) {
+        free(ctx.options);
+    }
 
     return rc;
 }

unit_tests/check_regex.c

@@ -219,11 +219,16 @@ static const struct rtest {
      "http://www.paypal.com", "pics.ebay.com", RTR_WHITELISTED},
     {NULL, "http://somefakeurl.example.com", "someotherdomain-key.com", RTR_CLEAN},
     {NULL, "http://somefakeurl.example.com", "someotherdomain.key.com", RTR_PHISH},
-    {NULL, "http://1.test.example.com/something", "test", RTR_BLACKLISTED},
-    {NULL, "http://1.test.example.com/2", "test", RTR_BLACKLISTED},
-    {NULL, "http://user@1.test.example.com/2", "test", RTR_BLACKLISTED},
-    {NULL, "http://user@1.test.example.com/2/test", "test", RTR_BLACKLISTED},
-    {NULL, "http://user@1.test.example.com/", "test", RTR_BLACKLISTED},
+    {NULL, "http://malware-test.example.com/something", "test", RTR_BLACKLISTED},
+    {NULL, "http://phishing-test.example.com/something", "test", RTR_BLACKLISTED},
+    {NULL, "http://sub.malware-test.example.com/2", "test", RTR_BLACKLISTED},
+    {NULL, "http://sub.phishing-test.example.com/2", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@malware-test.example.com/2", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@phishing-test.example.com/2", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@malware-test.example.com/2/test", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@phishing-test.example.com/2/test", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@malware-test.example.com/", "test", RTR_BLACKLISTED},
+    {NULL, "http://user@phishing-test.example.com/", "test", RTR_BLACKLISTED},
     {NULL, "http://x.exe", "http:///x.exe", RTR_CLEAN},
     {".+\\.ebayrtm\\.com([/?].*)?:[^.]+\\.ebay\\.(de|com|co\\.uk)/",
      "http://srx.main.ebayrtm.com",
@@ -430,8 +435,17 @@ static void do_phishing_test(const struct rtest *rtest)
                               "this should be blacklisted, realURL: %s, displayURL: %s",
                               rtest->realurl, rtest->displayurl);
                 if (*ctx.virname) {
-                    char *phishingFound = strstr((const char *)*ctx.virname, "Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net");
-                    ck_assert_msg(phishingFound != NULL, "\n\t should be: Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net,\n\t but is:    %s\n", *ctx.virname);
+                    char *phishingFound = NULL;
+                    char *detectionName = NULL;
+                    if (strstr(rtest->realurl, "malware-test")) {
+                        detectionName = "Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net";
+
+                    } else if (strstr(rtest->realurl, "phishing-test")) {
+                        detectionName = "Heuristics.Safebrowsing.Suspected-phishing_safebrowsing.clamav.net";
+                    }
+                    ck_assert_msg(detectionName != NULL, "\n\t Blacklist test case error - malware-test or phishing-test not found in: %s\n", rtest->realurl);
+                    phishingFound = strstr((const char *)*ctx.virname, detectionName);
+                    ck_assert_msg(phishingFound != NULL, "\n\t should be: %s,\n\t but is:    %s\n", detectionName, *ctx.virname);
                 }
             }
             break;
@@ -512,8 +526,17 @@ static void do_phishing_test_allscan(const struct rtest *rtest)
                               "this should be blacklisted, realURL: %s, displayURL: %s",
                               rtest->realurl, rtest->displayurl);
                 if (*ctx.virname) {
-                    char *phishingFound = strstr((const char *)*ctx.virname, "Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net");
-                    ck_assert_msg(phishingFound != NULL, "\n\t should be: Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net,\n\t but is:    %s\n", *ctx.virname);
+                    char *phishingFound = NULL;
+                    char *detectionName = NULL;
+                    if (strstr(rtest->realurl, "malware-test")) {
+                        detectionName = "Heuristics.Safebrowsing.Suspected-malware_safebrowsing.clamav.net";
+
+                    } else if (strstr(rtest->realurl, "phishing-test")) {
+                        detectionName = "Heuristics.Safebrowsing.Suspected-phishing_safebrowsing.clamav.net";
+                    }
+                    ck_assert_msg(detectionName != NULL, "\n\t Blacklist test case error - malware-test or phishing-test not found in: %s\n", rtest->realurl);
+                    phishingFound = strstr((const char *)*ctx.virname, detectionName);
+                    ck_assert_msg(phishingFound != NULL, "\n\t should be: %s,\n\t but is:    %s\n", detectionName, *ctx.virname);
                 }
             }
             break;

unit_tests/input/daily.gdb

@@ -1,4 +1,6 @@
-S:P:d1b8a025
-S:F:d1b8a0251d7555d016b6468ae623e4b1e830c7efccc54966d09447a3d0a85c60
-S2:P:7f6fd541
-S2:F:7f6fd541e625e7bc5d5a64f166e47ecfe13735464a74d160b48265c162a71089
+# Google Safe Browsing Malware Site rule for malware-test.example.com/
+S:P:4d8bef53
+S:F:4d8bef53100a92ef3b9490dc234c6c4a6d0f45bf73cb13b166188cd802c1a080
+# Google Safe Browsing Phishing Site rule for phishing-test.example.com/
+S2:P:f396c58e
+S2:F:f396c58e768d8b9ddc6a21bc17c90be9a68e019d964c8003699ee17b3e4dd4b6