From 966502dcaa571ab5ff71343a4f297e2ab27693a4 Mon Sep 17 00:00:00 2001 From: Max Rees Date: Mon, 2 Mar 2020 18:18:03 -0600 Subject: user/libexif: patch CVE-2016-6328 and CVE-2019-9278 --- user/libexif/APKBUILD | 11 +++++- user/libexif/CVE-2016-6328.patch | 60 ++++++++++++++++++++++++++++ user/libexif/CVE-2019-9278.patch | 85 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 154 insertions(+), 2 deletions(-) create mode 100644 user/libexif/CVE-2016-6328.patch create mode 100644 user/libexif/CVE-2019-9278.patch (limited to 'user/libexif') diff --git a/user/libexif/APKBUILD b/user/libexif/APKBUILD index de51ae7b0..06e1e832a 100644 --- a/user/libexif/APKBUILD +++ b/user/libexif/APKBUILD @@ -1,7 +1,7 @@ # Maintainer: pkgname=libexif pkgver=0.6.21 -pkgrel=3 +pkgrel=4 pkgdesc="Library to parse EXIF metadata" url="https://sourceforge.net/projects/libexif" arch="all" @@ -10,14 +10,19 @@ subpackages="$pkgname-dev $pkgname-doc $pkgname-lang" depends="" makedepends="" source="https://downloads.sourceforge.net/$pkgname/$pkgname-$pkgver.tar.bz2 + CVE-2016-6328.patch CVE-2017-7544.patch CVE-2018-20030.patch + CVE-2019-9278.patch " # secfixes: # 0.6.21-r3: # - CVE-2017-7544 # - CVE-2018-20030 +# 0.6.21-r4: +# - CVE-2016-6328 +# - CVE-2019-9278 prepare() { default_prepare @@ -41,5 +46,7 @@ package() { } sha512sums="4e0fe2abe85d1c95b41cb3abe1f6333dc3a9eb69dba106a674a78d74a4d5b9c5a19647118fa1cc2d72b98a29853394f1519eda9e2889eb28d3be26b21c7cfc35 libexif-0.6.21.tar.bz2 +c0d4c74207993efc373615ef2c797d720162a2ee6fd7ad026edf2ced4198d9b1165b88790c2af3194f6bb7c2de88d4672c041c2cff8a82c8914700633332b8c5 CVE-2016-6328.patch d529c6c5bd26dc21c0946702574184e1f61c2bfd4fb95b41e314f486a0dd55571963ff2cad566d2fb0804de3c0799bcd956c15a3dc10a520ce207728edad4e2d CVE-2017-7544.patch -0d6123bd275ace338ad9cebb31a2e714de0141b91860f07394b281686a5393566c3f4159679d4ba689ae7ea69ae2e412b158c3deb451c40c210b5817f6888bbc CVE-2018-20030.patch" +0d6123bd275ace338ad9cebb31a2e714de0141b91860f07394b281686a5393566c3f4159679d4ba689ae7ea69ae2e412b158c3deb451c40c210b5817f6888bbc CVE-2018-20030.patch +c30c03fefea94d175b94c9f0c4d60cbb3aa0ad78b0d29008975fbbb15c17f2907a16fd50970e5fa18d533d0ce291a5ee9b62934210cb40b0f463693460607738 CVE-2019-9278.patch" diff --git a/user/libexif/CVE-2016-6328.patch b/user/libexif/CVE-2016-6328.patch new file mode 100644 index 000000000..0568f27d2 --- /dev/null +++ b/user/libexif/CVE-2016-6328.patch @@ -0,0 +1,60 @@ +From 41bd04234b104312f54d25822f68738ba8d7133d Mon Sep 17 00:00:00 2001 +From: Marcus Meissner +Date: Tue, 25 Jul 2017 23:44:44 +0200 +Subject: [PATCH] fixes some (not all) buffer overreads during decoding pentax + makernote entries. + +This should fix: +https://sourceforge.net/p/libexif/bugs/125/ CVE-2016-6328 +--- + libexif/pentax/mnote-pentax-entry.c | 16 +++++++++++++--- + 1 file changed, 13 insertions(+), 3 deletions(-) + +diff --git a/libexif/pentax/mnote-pentax-entry.c b/libexif/pentax/mnote-pentax-entry.c +index d03d159..ea0429a 100644 +--- a/libexif/pentax/mnote-pentax-entry.c ++++ b/libexif/pentax/mnote-pentax-entry.c +@@ -425,24 +425,34 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry, + case EXIF_FORMAT_SHORT: + { + const unsigned char *data = entry->data; +- size_t k, len = strlen(val); ++ size_t k, len = strlen(val), sizeleft; ++ ++ sizeleft = entry->size; + for(k=0; kcomponents; k++) { ++ if (sizeleft < 2) ++ break; + vs = exif_get_short (data, entry->order); + snprintf (val+len, maxlen-len, "%i ", vs); + len = strlen(val); + data += 2; ++ sizeleft -= 2; + } + } + break; + case EXIF_FORMAT_LONG: + { + const unsigned char *data = entry->data; +- size_t k, len = strlen(val); ++ size_t k, len = strlen(val), sizeleft; ++ ++ sizeleft = entry->size; + for(k=0; kcomponents; k++) { ++ if (sizeleft < 4) ++ break; + vl = exif_get_long (data, entry->order); + snprintf (val+len, maxlen-len, "%li", (long int) vl); + len = strlen(val); + data += 4; ++ sizeleft -= 4; + } + } + break; +@@ -455,5 +465,5 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry, + break; + } + +- return (val); ++ return val; + } diff --git a/user/libexif/CVE-2019-9278.patch b/user/libexif/CVE-2019-9278.patch new file mode 100644 index 000000000..bd15e8d13 --- /dev/null +++ b/user/libexif/CVE-2019-9278.patch @@ -0,0 +1,85 @@ +From 75aa73267fdb1e0ebfbc00369e7312bac43d0566 Mon Sep 17 00:00:00 2001 +From: Marcus Meissner +Date: Sat, 18 Jan 2020 09:29:42 +0100 +Subject: [PATCH] fix CVE-2019-9278 + +avoid the use of unsafe integer overflow checking constructs (unsigned integer operations cannot overflow, so "u1 + u2 > u1" can be optimized away) + +check for the actual sizes, which should also handle the overflows +document other places google patched, but do not seem relevant due to other restrictions + +fixes https://github.com/libexif/libexif/issues/26 +--- + libexif/exif-data.c | 28 ++++++++++++++++++---------- + 1 file changed, 18 insertions(+), 10 deletions(-) + +diff --git a/libexif/exif-data.c b/libexif/exif-data.c +index a6f9c94..6332cd1 100644 +--- a/libexif/exif-data.c ++++ b/libexif/exif-data.c +@@ -192,9 +192,15 @@ exif_data_load_data_entry (ExifData *data, ExifEntry *entry, + doff = offset + 8; + + /* Sanity checks */ +- if ((doff + s < doff) || (doff + s < s) || (doff + s > size)) { ++ if (doff >= size) { + exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", +- "Tag data past end of buffer (%u > %u)", doff+s, size); ++ "Tag starts past end of buffer (%u > %u)", doff, size); ++ return 0; ++ } ++ ++ if (s > size - doff) { ++ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", ++ "Tag data goes past end of buffer (%u > %u)", doff+s, size); + return 0; + } + +@@ -315,13 +321,14 @@ exif_data_load_data_thumbnail (ExifData *data, const unsigned char *d, + unsigned int ds, ExifLong o, ExifLong s) + { + /* Sanity checks */ +- if ((o + s < o) || (o + s < s) || (o + s > ds) || (o > ds)) { +- exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", +- "Bogus thumbnail offset (%u) or size (%u).", +- o, s); ++ if (o >= ds) { ++ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", "Bogus thumbnail offset (%u).", o); ++ return; ++ } ++ if (s > ds - o) { ++ exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", "Bogus thumbnail size (%u), max would be %u.", s, ds-o); + return; + } +- + if (data->data) + exif_mem_free (data->priv->mem, data->data); + if (!(data->data = exif_data_alloc (data, s))) { +@@ -947,7 +954,7 @@ exif_data_load_data (ExifData *data, const unsigned char *d_orig, + exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", + "IFD 0 at %i.", (int) offset); + +- /* Sanity check the offset, being careful about overflow */ ++ /* ds is restricted to 16 bit above, so offset is restricted too, and offset+8 should not overflow. */ + if (offset > ds || offset + 6 + 2 > ds) + return; + +@@ -956,6 +963,7 @@ exif_data_load_data (ExifData *data, const unsigned char *d_orig, + + /* IFD 1 offset */ + n = exif_get_short (d + 6 + offset, data->priv->order); ++ /* offset < 2<<16, n is 16 bit at most, so this op will not overflow */ + if (offset + 6 + 2 + 12 * n + 4 > ds) + return; + +@@ -964,8 +972,8 @@ exif_data_load_data (ExifData *data, const unsigned char *d_orig, + exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData", + "IFD 1 at %i.", (int) offset); + +- /* Sanity check. */ +- if (offset > ds || offset + 6 > ds) { ++ /* Sanity check. ds is ensured to be above 6 above, offset is 16bit */ ++ if (offset > ds - 6) { + exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, + "ExifData", "Bogus offset of IFD1."); + } else { -- cgit v1.2.3-70-g09d2