aboutsummaryrefslogtreecommitdiff
path: root/gnu/packages/patches/unzip-CVE-2022-0529+CVE-2022-0530.patch
blob: e3fe2314acfd97e6370bebfd46a1b0fc08fb1183 (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
https://nvd.nist.gov/vuln/detail/CVE-2022-0529
https://nvd.nist.gov/vuln/detail/CVE-2022-0530
https://sources.debian.org/src/unzip/6.0-27/debian/patches/28-cve-2022-0529-and-cve-2022-0530.patch/

From: Steven M. Schweda <sms@antinode.info>
Subject: Fix for CVE-2022-0529 and CVE-2022-0530
Bug-Debian: https://bugs.debian.org/1010355
X-Debian-version: 6.0-27

--- a/fileio.c
+++ b/fileio.c
@@ -171,8 +171,10 @@
 static ZCONST char Far FilenameTooLongTrunc[] =
   "warning:  filename too long--truncating.\n";
 #ifdef UNICODE_SUPPORT
+   static ZCONST char Far UFilenameCorrupt[] =
+     "error: Unicode filename corrupt.\n";
    static ZCONST char Far UFilenameTooLongTrunc[] =
-     "warning:  Converted unicode filename too long--truncating.\n";
+     "warning:  Converted Unicode filename too long--truncating.\n";
 #endif
 static ZCONST char Far ExtraFieldTooLong[] =
   "warning:  extra field too long (%d).  Ignoring...\n";
@@ -2361,16 +2363,30 @@
                   /* convert UTF-8 to local character set */
                   fn = utf8_to_local_string(G.unipath_filename,
                                             G.unicode_escape_all);
-                  /* make sure filename is short enough */
-                  if (strlen(fn) >= FILNAMSIZ) {
-                    fn[FILNAMSIZ - 1] = '\0';
+
+                  /* 2022-07-22 SMS, et al.  CVE-2022-0530
+                   * Detect conversion failure, emit message.
+                   * Continue with unconverted name.
+                   */
+                  if (fn == NULL)
+                  {
                     Info(slide, 0x401, ((char *)slide,
-                      LoadFarString(UFilenameTooLongTrunc)));
-                    error = PK_WARN;
+                     LoadFarString(UFilenameCorrupt)));
+                    error = PK_ERR;
+                  }
+                  else
+                  {
+                    /* make sure filename is short enough */
+                    if (strlen(fn) >= FILNAMSIZ) {
+                      fn[FILNAMSIZ - 1] = '\0';
+                      Info(slide, 0x401, ((char *)slide,
+                        LoadFarString(UFilenameTooLongTrunc)));
+                      error = PK_WARN;
+                    }
+                    /* replace filename with converted UTF-8 */
+                    strcpy(G.filename, fn);
+                    free(fn);
                   }
-                  /* replace filename with converted UTF-8 */
-                  strcpy(G.filename, fn);
-                  free(fn);
                 }
 # endif /* UNICODE_WCHAR */
                 if (G.unipath_filename != G.filename_full)
--- a/process.c
+++ b/process.c
@@ -222,6 +222,8 @@
      "\nwarning:  Unicode Path version > 1\n";
    static ZCONST char Far UnicodeMismatchError[] =
      "\nwarning:  Unicode Path checksum invalid\n";
+   static ZCONST char Far UFilenameTooLongTrunc[] =
+     "warning:  filename too long (P1) -- truncating.\n";
 #endif
 
 
@@ -1915,7 +1917,7 @@
     Sets both local header and central header fields.  Not terribly clever,
     but it means that this procedure is only called in one place.
 
-    2014-12-05 SMS.
+    2014-12-05 SMS.  (oCERT.org report.)  CVE-2014-8141.
     Added checks to ensure that enough data are available before calling
     makeint64() or makelong().  Replaced various sizeof() values with
     simple ("4" or "8") constants.  (The Zip64 structures do not depend
@@ -1947,9 +1949,10 @@
               ef_len - EB_HEADSIZE));
             break;
         }
+
         if (eb_id == EF_PKSZ64)
         {
-          int offset = EB_HEADSIZE;
+          unsigned offset = EB_HEADSIZE;
 
           if ((G.crec.ucsize == Z64FLGL) || (G.lrec.ucsize == Z64FLGL))
           {
@@ -2046,7 +2049,7 @@
         }
         if (eb_id == EF_UNIPATH) {
 
-          int offset = EB_HEADSIZE;
+          unsigned offset = EB_HEADSIZE;
           ush ULen = eb_len - 5;
           ulg chksum = CRCVAL_INITIAL;
 
@@ -2504,16 +2507,17 @@
   int state_dependent;
   int wsize = 0;
   int max_bytes = MB_CUR_MAX;
-  char buf[9];
+  char buf[ MB_CUR_MAX+ 1];             /* ("+1" not really needed?) */
   char *buffer = NULL;
   char *local_string = NULL;
+  size_t buffer_size;                   /* CVE-2022-0529 */
 
   for (wsize = 0; wide_string[wsize]; wsize++) ;
 
   if (max_bytes < MAX_ESCAPE_BYTES)
     max_bytes = MAX_ESCAPE_BYTES;
-
-  if ((buffer = (char *)malloc(wsize * max_bytes + 1)) == NULL) {
+  buffer_size = wsize * max_bytes + 1;          /* Reused below. */
+  if ((buffer = (char *)malloc( buffer_size)) == NULL) {
     return NULL;
   }
 
@@ -2551,8 +2555,28 @@
     } else {
       /* no MB for this wide */
         /* use escape for wide character */
-        char *escape_string = wide_to_escape_string(wide_string[i]);
-        strcat(buffer, escape_string);
+        size_t buffer_len;
+        size_t escape_string_len;
+        char *escape_string;
+        int err_msg = 0;
+
+        escape_string = wide_to_escape_string(wide_string[i]);
+        buffer_len = strlen( buffer);
+        escape_string_len = strlen( escape_string);
+
+        /* Append escape string, as space allows. */
+        /* 2022-07-18 SMS, et al.  CVE-2022-0529 */
+        if (escape_string_len > buffer_size- buffer_len- 1)
+        {
+            escape_string_len = buffer_size- buffer_len- 1;
+            if (err_msg == 0)
+            {
+                err_msg = 1;
+                Info(slide, 0x401, ((char *)slide,
+                 LoadFarString( UFilenameTooLongTrunc)));
+            }
+        }
+        strncat( buffer, escape_string, escape_string_len);
         free(escape_string);
     }
   }
@@ -2604,9 +2628,18 @@
   ZCONST char *utf8_string;
   int escape_all;
 {
-  zwchar *wide = utf8_to_wide_string(utf8_string);
-  char *loc = wide_to_local_string(wide, escape_all);
-  free(wide);
+  zwchar *wide;
+  char *loc = NULL;
+
+  wide = utf8_to_wide_string( utf8_string);
+
+  /* 2022-07-25 SMS, et al.  CVE-2022-0530 */
+  if (wide != NULL)
+  {
+    loc = wide_to_local_string( wide, escape_all);
+    free( wide);
+  }
+
   return loc;
 }