Commit 63e470b8 authored by Leo's avatar Leo
Browse files

community/zziplib: fix CVE-2018-16548 and CVE-2018-17828

parent f62f9a1c
Pipeline #1402 passed with stages
in 4 minutes and 40 seconds
......@@ -2,7 +2,7 @@
# Maintainer: Mika Havela <mika.havela@gmail.com>
pkgname=zziplib
pkgver=0.13.69
pkgrel=1
pkgrel=2
pkgdesc="Lightweight library to easily extract data from zip files"
url="https://github.com/gdraheim/zziplib"
arch="all"
......@@ -10,11 +10,17 @@ license="LGPL-2.0-or-later MPL-1.1"
makedepends="zlib-dev python2"
checkdepends="zip"
subpackages="$pkgname-dev $pkgname-doc $pkgname-utils"
source="$pkgname-$pkgver.tar.gz::https://github.com/gdraheim/$pkgname/archive/v$pkgver.tar.gz"
builddir="$srcdir/$pkgname-$pkgver"
source="zziplib-$pkgver.tar.gz::https://github.com/gdraheim/zziplib/archive/v$pkgver.tar.gz
CVE-2018-17828.patch
CVE-2018-16548.patch
"
# secfixes
# 0.13.69-r2:
# - CVE-2018-16548
# - CVE-2018-17828
build() {
cd "$builddir"
./configure \
--prefix=/usr \
--disable-static
......@@ -22,12 +28,10 @@ build() {
}
check() {
cd "$builddir"
make check
}
package() {
cd "$builddir"
make DESTDIR="$pkgdir" install
}
......@@ -37,4 +41,6 @@ utils() {
mv "$pkgdir"/usr/bin "$subpkgdir"/usr/
}
sha512sums="ade026289737f43ca92a8746818d87dd7618d473dbce159546ce9071c9e4cbe164a6b1c9efff16efb7aa0327b2ec6b34f3256c6bda19cd6e325703fffc810ef0 zziplib-0.13.69.tar.gz"
sha512sums="ade026289737f43ca92a8746818d87dd7618d473dbce159546ce9071c9e4cbe164a6b1c9efff16efb7aa0327b2ec6b34f3256c6bda19cd6e325703fffc810ef0 zziplib-0.13.69.tar.gz
9aef14fa0e531caafe18f836e0b34feee9a85e30da0bc5fe3dda5cf77b29c5d4e47c831dc419a59160aa68f288725f9c76dd3357bc0f2e9d62a8758a7d148d0b CVE-2018-17828.patch
8d4c284d1e7b455cb5ecfc7990871fd4df6ee2ab59844f26ecdd94d1dcdb56105126913164678a2cb624b9be0e93b0d9e6fd8af7e2dcab05a66f0b0bd7c97a13 CVE-2018-16548.patch"
From 9411bde3e4a70a81ff3ffd256b71927b2d90dcbb Mon Sep 17 00:00:00 2001
From: jmoellers <josef.moellers@suse.com>
Date: Fri, 7 Sep 2018 11:32:04 +0200
Subject: [PATCH] Avoid memory leak from __zzip_parse_root_directory().
---
test/test.zip | Bin 1361 -> 1361 bytes
zzip/zip.c | 36 ++++++++++++++++++++++++++++++++++--
2 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/zzip/zip.c b/zzip/zip.c
index 88b833b..a685280 100644
--- a/zzip/zip.c
+++ b/zzip/zip.c
@@ -475,9 +475,15 @@ __zzip_parse_root_directory(int fd,
} else
{
if (io->fd.seeks(fd, zz_rootseek + zz_offset, SEEK_SET) < 0)
+ {
+ free(hdr0);
return ZZIP_DIR_SEEK;
+ }
if (io->fd.read(fd, &dirent, sizeof(dirent)) < __sizeof(dirent))
+ {
+ free(hdr0);
return ZZIP_DIR_READ;
+ }
d = &dirent;
}
@@ -577,12 +583,38 @@ __zzip_parse_root_directory(int fd,
if (hdr_return)
*hdr_return = hdr0;
+ else
+ {
+ /* If it is not assigned to *hdr_return, it will never be free()'d */
+ free(hdr0);
+ /* Make sure we don't free it again in case of error */
+ hdr0 = NULL;
+ }
} /* else zero (sane) entries */
# ifndef ZZIP_ALLOW_MODULO_ENTRIES
- return (entries != zz_entries ? ZZIP_CORRUPTED : 0);
+ if (entries != zz_entries)
+ {
+ /* If it was assigned to *hdr_return, undo assignment */
+ if (p_reclen && hdr_return)
+ *hdr_return = NULL;
+ /* Free it, if it was not already free()'d */
+ if (hdr0 != NULL)
+ free(hdr0);
+ return ZZIP_CORRUPTED;
+ }
# else
- return ((entries & (unsigned)0xFFFF) != zz_entries ? ZZIP_CORRUPTED : 0);
+ if (((entries & (unsigned)0xFFFF) != zz_entries)
+ {
+ /* If it was assigned to *hdr_return, undo assignment */
+ if (p_reclen && hdr_return)
+ *hdr_return = NULL;
+ /* Free it, if it was not already free()'d */
+ if (hdr0 != NULL)
+ free(hdr0);
+ return ZZIP_CORRUPTED;
+ }
# endif
+ return 0;
}
/* ------------------------- high-level interface ------------------------- */
From d2e5d5c53212e54a97ad64b793a4389193fec687 Mon Sep 17 00:00:00 2001
From: jmoellers <josef.moellers@suse.com>
Date: Fri, 7 Sep 2018 11:49:28 +0200
Subject: [PATCH] Avoid memory leak from __zzip_parse_root_directory().
---
zzip/zip.c | 25 ++-----------------------
1 file changed, 2 insertions(+), 23 deletions(-)
diff --git a/zzip/zip.c b/zzip/zip.c
index a685280..51a1a4d 100644
--- a/zzip/zip.c
+++ b/zzip/zip.c
@@ -587,34 +587,13 @@ __zzip_parse_root_directory(int fd,
{
/* If it is not assigned to *hdr_return, it will never be free()'d */
free(hdr0);
- /* Make sure we don't free it again in case of error */
- hdr0 = NULL;
}
} /* else zero (sane) entries */
# ifndef ZZIP_ALLOW_MODULO_ENTRIES
- if (entries != zz_entries)
- {
- /* If it was assigned to *hdr_return, undo assignment */
- if (p_reclen && hdr_return)
- *hdr_return = NULL;
- /* Free it, if it was not already free()'d */
- if (hdr0 != NULL)
- free(hdr0);
- return ZZIP_CORRUPTED;
- }
+ return (entries != zz_entries) ? ZZIP_CORRUPTED : 0;
# else
- if (((entries & (unsigned)0xFFFF) != zz_entries)
- {
- /* If it was assigned to *hdr_return, undo assignment */
- if (p_reclen && hdr_return)
- *hdr_return = NULL;
- /* Free it, if it was not already free()'d */
- if (hdr0 != NULL)
- free(hdr0);
- return ZZIP_CORRUPTED;
- }
+ return ((entries & (unsigned)0xFFFF) != zz_entries) ? ZZIP_CORRUPTED : 0;
# endif
- return 0;
}
/* ------------------------- high-level interface ------------------------- */
From 0e1dadb05c1473b9df2d7b8f298dab801778ef99 Mon Sep 17 00:00:00 2001
From: jmoellers <josef.moellers@suse.com>
Date: Fri, 7 Sep 2018 13:55:35 +0200
Subject: [PATCH] One more free() to avoid memory leak.
---
zzip/zip.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/zzip/zip.c b/zzip/zip.c
index 51a1a4d..bc6c080 100644
--- a/zzip/zip.c
+++ b/zzip/zip.c
@@ -589,6 +589,8 @@ __zzip_parse_root_directory(int fd,
free(hdr0);
}
} /* else zero (sane) entries */
+ else
+ free(hdr0);
# ifndef ZZIP_ALLOW_MODULO_ENTRIES
return (entries != zz_entries) ? ZZIP_CORRUPTED : 0;
# else
From 81dfa6b3e08f6934885ba5c98939587d6850d08e Mon Sep 17 00:00:00 2001
From: Josef Moellers <jmoellers@suse.de>
Date: Thu, 4 Oct 2018 14:21:48 +0200
Subject: [PATCH] Fix issue #62: Remove any "../" components from pathnames of
extracted files. [CVE-2018-17828]
---
bins/unzzipcat-big.c | 57 +++++++++++++++++++++++++++++++++++++++++++-
bins/unzzipcat-mem.c | 57 +++++++++++++++++++++++++++++++++++++++++++-
bins/unzzipcat-mix.c | 57 +++++++++++++++++++++++++++++++++++++++++++-
bins/unzzipcat-zip.c | 57 +++++++++++++++++++++++++++++++++++++++++++-
4 files changed, 224 insertions(+), 4 deletions(-)
diff --git a/bins/unzzipcat-big.c b/bins/unzzipcat-big.c
index 982d262..88c4d65 100644
--- a/bins/unzzipcat-big.c
+++ b/bins/unzzipcat-big.c
@@ -53,6 +53,48 @@ static void unzzip_cat_file(FILE* disk, char* name, FILE* out)
}
}
+/*
+ * NAME: remove_dotdotslash
+ * PURPOSE: To remove any "../" components from the given pathname
+ * ARGUMENTS: path: path name with maybe "../" components
+ * RETURNS: Nothing, "path" is modified in-place
+ * NOTE: removing "../" from the path ALWAYS shortens the path, never adds to it!
+ * Also, "path" is not used after creating it.
+ * So modifying "path" in-place is safe to do.
+ */
+static inline void
+remove_dotdotslash(char *path)
+{
+ /* Note: removing "../" from the path ALWAYS shortens the path, never adds to it! */
+ char *dotdotslash;
+ int warned = 0;
+
+ dotdotslash = path;
+ while ((dotdotslash = strstr(dotdotslash, "../")) != NULL)
+ {
+ /*
+ * Remove only if at the beginning of the pathname ("../path/name")
+ * or when preceded by a slash ("path/../name"),
+ * otherwise not ("path../name..")!
+ */
+ if (dotdotslash == path || dotdotslash[-1] == '/')
+ {
+ char *src, *dst;
+ if (!warned)
+ {
+ /* Note: the first time through the pathname is still intact */
+ fprintf(stderr, "Removing \"../\" path component(s) in %s\n", path);
+ warned = 1;
+ }
+ /* We cannot use strcpy(), as there "The strings may not overlap" */
+ for (src = dotdotslash+3, dst=dotdotslash; (*dst = *src) != '\0'; src++, dst++)
+ ;
+ }
+ else
+ dotdotslash +=3; /* skip this instance to prevent infinite loop */
+ }
+}
+
static void makedirs(const char* name)
{
char* p = strrchr(name, '/');
@@ -70,6 +112,16 @@ static void makedirs(const char* name)
static FILE* create_fopen(char* name, char* mode, int subdirs)
{
+ char *name_stripped;
+ FILE *fp;
+ int mustfree = 0;
+
+ if ((name_stripped = strdup(name)) != NULL)
+ {
+ remove_dotdotslash(name_stripped);
+ name = name_stripped;
+ mustfree = 1;
+ }
if (subdirs)
{
char* p = strrchr(name, '/');
@@ -79,7 +131,10 @@ static FILE* create_fopen(char* name, char* mode, int subdirs)
free (dir_name);
}
}
- return fopen(name, mode);
+ fp = fopen(name, mode);
+ if (mustfree)
+ free(name_stripped);
+ return fp;
}
diff --git a/bins/unzzipcat-mem.c b/bins/unzzipcat-mem.c
index 9bc966b..793bde8 100644
--- a/bins/unzzipcat-mem.c
+++ b/bins/unzzipcat-mem.c
@@ -58,6 +58,48 @@ static void unzzip_mem_disk_cat_file(ZZIP_MEM_DISK* disk, char* name, FILE* out)
}
}
+/*
+ * NAME: remove_dotdotslash
+ * PURPOSE: To remove any "../" components from the given pathname
+ * ARGUMENTS: path: path name with maybe "../" components
+ * RETURNS: Nothing, "path" is modified in-place
+ * NOTE: removing "../" from the path ALWAYS shortens the path, never adds to it!
+ * Also, "path" is not used after creating it.
+ * So modifying "path" in-place is safe to do.
+ */
+static inline void
+remove_dotdotslash(char *path)
+{
+ /* Note: removing "../" from the path ALWAYS shortens the path, never adds to it! */
+ char *dotdotslash;
+ int warned = 0;
+
+ dotdotslash = path;
+ while ((dotdotslash = strstr(dotdotslash, "../")) != NULL)
+ {
+ /*
+ * Remove only if at the beginning of the pathname ("../path/name")
+ * or when preceded by a slash ("path/../name"),
+ * otherwise not ("path../name..")!
+ */
+ if (dotdotslash == path || dotdotslash[-1] == '/')
+ {
+ char *src, *dst;
+ if (!warned)
+ {
+ /* Note: the first time through the pathname is still intact */
+ fprintf(stderr, "Removing \"../\" path component(s) in %s\n", path);
+ warned = 1;
+ }
+ /* We cannot use strcpy(), as there "The strings may not overlap" */
+ for (src = dotdotslash+3, dst=dotdotslash; (*dst = *src) != '\0'; src++, dst++)
+ ;
+ }
+ else
+ dotdotslash +=3; /* skip this instance to prevent infinite loop */
+ }
+}
+
static void makedirs(const char* name)
{
char* p = strrchr(name, '/');
@@ -75,6 +117,16 @@ static void makedirs(const char* name)
static FILE* create_fopen(char* name, char* mode, int subdirs)
{
+ char *name_stripped;
+ FILE *fp;
+ int mustfree = 0;
+
+ if ((name_stripped = strdup(name)) != NULL)
+ {
+ remove_dotdotslash(name_stripped);
+ name = name_stripped;
+ mustfree = 1;
+ }
if (subdirs)
{
char* p = strrchr(name, '/');
@@ -84,7 +136,10 @@ static FILE* create_fopen(char* name, char* mode, int subdirs)
free (dir_name);
}
}
- return fopen(name, mode);
+ fp = fopen(name, mode);
+ if (mustfree)
+ free(name_stripped);
+ return fp;
}
static int unzzip_cat (int argc, char ** argv, int extract)
diff --git a/bins/unzzipcat-mix.c b/bins/unzzipcat-mix.c
index 91c2f00..73b6ed6 100644
--- a/bins/unzzipcat-mix.c
+++ b/bins/unzzipcat-mix.c
@@ -69,6 +69,48 @@ static void unzzip_cat_file(ZZIP_DIR* disk, char* name, FILE* out)
}
}
+/*
+ * NAME: remove_dotdotslash
+ * PURPOSE: To remove any "../" components from the given pathname
+ * ARGUMENTS: path: path name with maybe "../" components
+ * RETURNS: Nothing, "path" is modified in-place
+ * NOTE: removing "../" from the path ALWAYS shortens the path, never adds to it!
+ * Also, "path" is not used after creating it.
+ * So modifying "path" in-place is safe to do.
+ */
+static inline void
+remove_dotdotslash(char *path)
+{
+ /* Note: removing "../" from the path ALWAYS shortens the path, never adds to it! */
+ char *dotdotslash;
+ int warned = 0;
+
+ dotdotslash = path;
+ while ((dotdotslash = strstr(dotdotslash, "../")) != NULL)
+ {
+ /*
+ * Remove only if at the beginning of the pathname ("../path/name")
+ * or when preceded by a slash ("path/../name"),
+ * otherwise not ("path../name..")!
+ */
+ if (dotdotslash == path || dotdotslash[-1] == '/')
+ {
+ char *src, *dst;
+ if (!warned)
+ {
+ /* Note: the first time through the pathname is still intact */
+ fprintf(stderr, "Removing \"../\" path component(s) in %s\n", path);
+ warned = 1;
+ }
+ /* We cannot use strcpy(), as there "The strings may not overlap" */
+ for (src = dotdotslash+3, dst=dotdotslash; (*dst = *src) != '\0'; src++, dst++)
+ ;
+ }
+ else
+ dotdotslash +=3; /* skip this instance to prevent infinite loop */
+ }
+}
+
static void makedirs(const char* name)
{
char* p = strrchr(name, '/');
@@ -86,6 +128,16 @@ static void makedirs(const char* name)
static FILE* create_fopen(char* name, char* mode, int subdirs)
{
+ char *name_stripped;
+ FILE *fp;
+ int mustfree = 0;
+
+ if ((name_stripped = strdup(name)) != NULL)
+ {
+ remove_dotdotslash(name_stripped);
+ name = name_stripped;
+ mustfree = 1;
+ }
if (subdirs)
{
char* p = strrchr(name, '/');
@@ -95,7 +147,10 @@ static FILE* create_fopen(char* name, char* mode, int subdirs)
free (dir_name);
}
}
- return fopen(name, mode);
+ fp = fopen(name, mode);
+ if (mustfree)
+ free(name_stripped);
+ return fp;
}
static int unzzip_cat (int argc, char ** argv, int extract)
diff --git a/bins/unzzipcat-zip.c b/bins/unzzipcat-zip.c
index 2810f85..7f7f3fa 100644
--- a/bins/unzzipcat-zip.c
+++ b/bins/unzzipcat-zip.c
@@ -69,6 +69,48 @@ static void unzzip_cat_file(ZZIP_DIR* disk, char* name, FILE* out)
}
}
+/*
+ * NAME: remove_dotdotslash
+ * PURPOSE: To remove any "../" components from the given pathname
+ * ARGUMENTS: path: path name with maybe "../" components
+ * RETURNS: Nothing, "path" is modified in-place
+ * NOTE: removing "../" from the path ALWAYS shortens the path, never adds to it!
+ * Also, "path" is not used after creating it.
+ * So modifying "path" in-place is safe to do.
+ */
+static inline void
+remove_dotdotslash(char *path)
+{
+ /* Note: removing "../" from the path ALWAYS shortens the path, never adds to it! */
+ char *dotdotslash;
+ int warned = 0;
+
+ dotdotslash = path;
+ while ((dotdotslash = strstr(dotdotslash, "../")) != NULL)
+ {
+ /*
+ * Remove only if at the beginning of the pathname ("../path/name")
+ * or when preceded by a slash ("path/../name"),
+ * otherwise not ("path../name..")!
+ */
+ if (dotdotslash == path || dotdotslash[-1] == '/')
+ {
+ char *src, *dst;
+ if (!warned)
+ {
+ /* Note: the first time through the pathname is still intact */
+ fprintf(stderr, "Removing \"../\" path component(s) in %s\n", path);
+ warned = 1;
+ }
+ /* We cannot use strcpy(), as there "The strings may not overlap" */
+ for (src = dotdotslash+3, dst=dotdotslash; (*dst = *src) != '\0'; src++, dst++)
+ ;
+ }
+ else
+ dotdotslash +=3; /* skip this instance to prevent infinite loop */
+ }
+}
+
static void makedirs(const char* name)
{
char* p = strrchr(name, '/');
@@ -86,6 +128,16 @@ static void makedirs(const char* name)
static FILE* create_fopen(char* name, char* mode, int subdirs)
{
+ char *name_stripped;
+ FILE *fp;
+ int mustfree = 0;
+
+ if ((name_stripped = strdup(name)) != NULL)
+ {
+ remove_dotdotslash(name_stripped);
+ name = name_stripped;
+ mustfree = 1;
+ }
if (subdirs)
{
char* p = strrchr(name, '/');
@@ -95,7 +147,10 @@ static FILE* create_fopen(char* name, char* mode, int subdirs)
free (dir_name);
}
}
- return fopen(name, mode);
+ fp = fopen(name, mode);
+ if (mustfree)
+ free(name_stripped);
+ return fp;
}
static int unzzip_cat (int argc, char ** argv, int extract)
diff --git a/bins/unzip-mem.c b/bins/unzip-mem.c
index c45cb72..ff564a5 100644
--- a/bins/unzip-mem.c
+++ b/bins/unzip-mem.c
@@ -88,10 +88,49 @@ static void zzip_mem_entry_pipe(ZZIP_MEM_DISK* disk,
}
}
+static inline void
+remove_dotdotslash(char *path)
+{
+ /* Note: removing "../" from the path ALWAYS shortens the path, never adds to it! */
+ char *dotdotslash;
+ int warned = 0;
+
+ dotdotslash = path;
+ while ((dotdotslash = strstr(dotdotslash, "../")) != NULL)
+ {
+ /*
+ * Remove only if at the beginning of the pathname ("../path/name")
+ * or when preceded by a slash ("path/../name"),
+ * otherwise not ("path../name..")!
+ */
+ if (dotdotslash == path || dotdotslash[-1] == '/')
+ {
+ char *src, *dst;
+ if (!warned)
+ {
+ /* Note: the first time through the pathname is still intact */
+ fprintf(stderr, "Removing \"../\" path component(s) in %s\n", path);
+ warned = 1;
+ }
+ /* We cannot use strcpy(), as there "The strings may not overlap" */
+ for (src = dotdotslash+3, dst=dotdotslash; (*dst = *src) != '\0'; src++, dst++)
+ ;
+ }
+ else
+ dotdotslash +=3; /* skip this instance to prevent infinite loop */
+ }
+}
+
static void zzip_mem_entry_make(ZZIP_MEM_DISK* disk,
ZZIP_MEM_ENTRY* entry)
{
- FILE* file = fopen (entry->zz_name, "wb");
+ char name_stripped[PATH_MAX];
+ FILE* file;
+
+ strncpy(name_stripped, entry->zz_name, PATH_MAX);
+ remove_dotdotslash(name_stripped);
+
+ file = fopen (name_stripped, "wb");
if (file) { zzip_mem_entry_pipe (disk, entry, file); fclose (file); }
perror (entry->zz_name);
if (status < EXIT_WARNINGS) status = EXIT_WARNINGS;
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