From: aszh07 <mail2sza...@gmail.com> Add Patch file to fix CVE-2024-20696
CVE: CVE-2024-20696 Signed-off-by: Nitin Wankhade <nitin.wankh...@kpit.com> Signed-off-by: Nikhil R <nikhi...@kpit.com> Signed-off-by: Steve Sakoman <st...@sakoman.com> --- .../libarchive/CVE-2024-20696.patch | 115 ++++++++++++++++++ .../libarchive/libarchive_3.7.4.bb | 3 +- 2 files changed, 117 insertions(+), 1 deletion(-) create mode 100644 meta/recipes-extended/libarchive/libarchive/CVE-2024-20696.patch diff --git a/meta/recipes-extended/libarchive/libarchive/CVE-2024-20696.patch b/meta/recipes-extended/libarchive/libarchive/CVE-2024-20696.patch new file mode 100644 index 0000000000..e55d58d37b --- /dev/null +++ b/meta/recipes-extended/libarchive/libarchive/CVE-2024-20696.patch @@ -0,0 +1,115 @@ +From eac15e252010c1189a5c0f461364dbe2cd2a68b1 Mon Sep 17 00:00:00 2001 +From: "Dustin L. Howett" <dus...@howett.net> +Date: Thu, 9 May 2024 18:59:17 -0500 +Subject: [PATCH] rar4 reader: protect copy_from_lzss_window_to_unp() (#2172) + +copy_from_lzss_window_to_unp unnecessarily took an `int` parameter where +both of its callers were holding a `size_t`. + +A lzss opcode chain could be constructed that resulted in a negative +copy length, which when passed into memcpy would result in a very, very +large positive number. + +Switching copy_from_lzss_window_to_unp to take a `size_t` allows it to +properly bounds-check length. + +In addition, this patch also ensures that `length` is not itself larger +than the destination buffer. + +CVE: CVE-2024-20696 +Upstream-Status: Backport [https://github.com/libarchive/libarchive/commit/eac15e252010c1189a5c0f461364dbe2cd2a68b1] + +Signed-off-by: Nitin Wankhade <nitin.wankh...@kpit.com> +--- + +--- a/libarchive/archive_read_support_format_rar.c 2024-04-26 14:52:59.000000000 +0530 ++++ b/libarchive/archive_read_support_format_rar.c 2024-12-12 07:35:33.287412704 +0530 +@@ -432,7 +432,7 @@ static int make_table_recurse(struct arc + struct huffman_table_entry *, int, int); + static int expand(struct archive_read *, int64_t *); + static int copy_from_lzss_window_to_unp(struct archive_read *, const void **, +- int64_t, int); ++ int64_t, size_t); + static const void *rar_read_ahead(struct archive_read *, size_t, ssize_t *); + static int parse_filter(struct archive_read *, const uint8_t *, uint16_t, + uint8_t); +@@ -2060,7 +2060,7 @@ read_data_compressed(struct archive_read + bs = rar->unp_buffer_size - rar->unp_offset; + else + bs = (size_t)rar->bytes_uncopied; +- ret = copy_from_lzss_window_to_unp(a, buff, rar->offset, (int)bs); ++ ret = copy_from_lzss_window_to_unp(a, buff, rar->offset, bs); + if (ret != ARCHIVE_OK) + return (ret); + rar->offset += bs; +@@ -2213,7 +2213,7 @@ read_data_compressed(struct archive_read + bs = rar->unp_buffer_size - rar->unp_offset; + else + bs = (size_t)rar->bytes_uncopied; +- ret = copy_from_lzss_window_to_unp(a, buff, rar->offset, (int)bs); ++ ret = copy_from_lzss_window_to_unp(a, buff, rar->offset, bs); + if (ret != ARCHIVE_OK) + return (ret); + rar->offset += bs; +@@ -3094,11 +3094,16 @@ copy_from_lzss_window(struct archive_rea + + static int + copy_from_lzss_window_to_unp(struct archive_read *a, const void **buffer, +- int64_t startpos, int length) ++ int64_t startpos, size_t length) + { + int windowoffs, firstpart; + struct rar *rar = (struct rar *)(a->format->data); + ++ if (length > rar->unp_buffer_size) ++ { ++ goto fatal; ++ } ++ + if (!rar->unp_buffer) + { + if ((rar->unp_buffer = malloc(rar->unp_buffer_size)) == NULL) +@@ -3110,17 +3115,17 @@ copy_from_lzss_window_to_unp(struct arch + } + + windowoffs = lzss_offset_for_position(&rar->lzss, startpos); +- if(windowoffs + length <= lzss_size(&rar->lzss)) { ++ if(windowoffs + length <= (size_t)lzss_size(&rar->lzss)) { + memcpy(&rar->unp_buffer[rar->unp_offset], &rar->lzss.window[windowoffs], + length); +- } else if (length <= lzss_size(&rar->lzss)) { ++ } else if (length <= (size_t)lzss_size(&rar->lzss)) { + firstpart = lzss_size(&rar->lzss) - windowoffs; + if (firstpart < 0) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Bad RAR file data"); + return (ARCHIVE_FATAL); + } +- if (firstpart < length) { ++ if ((size_t)firstpart < length) { + memcpy(&rar->unp_buffer[rar->unp_offset], + &rar->lzss.window[windowoffs], firstpart); + memcpy(&rar->unp_buffer[rar->unp_offset + firstpart], +@@ -3130,9 +3135,7 @@ copy_from_lzss_window_to_unp(struct arch + &rar->lzss.window[windowoffs], length); + } + } else { +- archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, +- "Bad RAR file data"); +- return (ARCHIVE_FATAL); ++ goto fatal; + } + rar->unp_offset += length; + if (rar->unp_offset >= rar->unp_buffer_size) +@@ -3140,6 +3143,11 @@ copy_from_lzss_window_to_unp(struct arch + else + *buffer = NULL; + return (ARCHIVE_OK); ++ ++fatal: ++ archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, ++ "Bad RAR file data"); ++ return (ARCHIVE_FATAL); + } + + static const void * diff --git a/meta/recipes-extended/libarchive/libarchive_3.7.4.bb b/meta/recipes-extended/libarchive/libarchive_3.7.4.bb index 6e406611f9..80b2e49eac 100644 --- a/meta/recipes-extended/libarchive/libarchive_3.7.4.bb +++ b/meta/recipes-extended/libarchive/libarchive_3.7.4.bb @@ -33,7 +33,8 @@ SRC_URI = "http://libarchive.org/downloads/libarchive-${PV}.tar.gz"; SRC_URI += "file://configurehack.patch \ file://CVE-2024-48957.patch \ file://CVE-2024-48958.patch \ - " + file://CVE-2024-20696.patch \ + " UPSTREAM_CHECK_URI = "http://libarchive.org/"; SRC_URI[sha256sum] = "7875d49596286055b52439ed42f044bd8ad426aa4cc5aabd96bfe7abb971d5e8" -- 2.43.0
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