diff options
Diffstat (limited to 'gnu/packages/patches')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch | 76 | ||||
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch | 28 | ||||
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch | 71 | ||||
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5158.patch | 45 |
4 files changed, 220 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch new file mode 100644 index 0000000000..8a41848ddf --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch @@ -0,0 +1,76 @@ +From a9de14175548c04e0f8be7fae219246509ba46a9 Mon Sep 17 00:00:00 2001 +From: Kevin Wolf <kwolf@redhat.com> +Date: Wed, 3 Jun 2015 14:13:31 +0200 +Subject: [PATCH 1/3] ide: Check array bounds before writing to io_buffer + (CVE-2015-5154) + +If the end_transfer_func of a command is called because enough data has +been read or written for the current PIO transfer, and it fails to +correctly call the command completion functions, the DRQ bit in the +status register and s->end_transfer_func may remain set. This allows the +guest to access further bytes in s->io_buffer beyond s->data_end, and +eventually overflowing the io_buffer. + +One case where this currently happens is emulation of the ATAPI command +START STOP UNIT. + +This patch fixes the problem by adding explicit array bounds checks +before accessing the buffer instead of relying on end_transfer_func to +function correctly. + +Cc: qemu-stable@nongnu.org +Signed-off-by: Kevin Wolf <kwolf@redhat.com> +--- + hw/ide/core.c | 16 ++++++++++++++++ + 1 file changed, 16 insertions(+) + +diff --git a/hw/ide/core.c b/hw/ide/core.c +index 122e955..44fcc23 100644 +--- a/hw/ide/core.c ++++ b/hw/ide/core.c +@@ -2021,6 +2021,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val) + } + + p = s->data_ptr; ++ if (p + 2 > s->data_end) { ++ return; ++ } ++ + *(uint16_t *)p = le16_to_cpu(val); + p += 2; + s->data_ptr = p; +@@ -2042,6 +2046,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr) + } + + p = s->data_ptr; ++ if (p + 2 > s->data_end) { ++ return 0; ++ } ++ + ret = cpu_to_le16(*(uint16_t *)p); + p += 2; + s->data_ptr = p; +@@ -2063,6 +2071,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val) + } + + p = s->data_ptr; ++ if (p + 4 > s->data_end) { ++ return; ++ } ++ + *(uint32_t *)p = le32_to_cpu(val); + p += 4; + s->data_ptr = p; +@@ -2084,6 +2096,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr) + } + + p = s->data_ptr; ++ if (p + 4 > s->data_end) { ++ return 0; ++ } ++ + ret = cpu_to_le32(*(uint32_t *)p); + p += 4; + s->data_ptr = p; +-- +1.8.3.1 diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch new file mode 100644 index 0000000000..f860cfa3db --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch @@ -0,0 +1,28 @@ +From aa851d30acfbb9580098ac1dc82885530cb8b3c1 Mon Sep 17 00:00:00 2001 +From: Kevin Wolf <kwolf@redhat.com> +Date: Wed, 3 Jun 2015 14:17:46 +0200 +Subject: [PATCH 2/3] ide/atapi: Fix START STOP UNIT command completion + +The command must be completed on all code paths. START STOP UNIT with +pwrcnd set should succeed without doing anything. + +Signed-off-by: Kevin Wolf <kwolf@redhat.com> +--- + hw/ide/atapi.c | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c +index 950e311..79dd167 100644 +--- a/hw/ide/atapi.c ++++ b/hw/ide/atapi.c +@@ -983,6 +983,7 @@ static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) + + if (pwrcnd) { + /* eject/load only happens for power condition == 0 */ ++ ide_atapi_cmd_ok(s); + return; + } + +-- +1.8.3.1 + diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch new file mode 100644 index 0000000000..3ade9b1600 --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch @@ -0,0 +1,71 @@ +From 1d3c2268f8708126a34064c2e0c1000b40e6f3e5 Mon Sep 17 00:00:00 2001 +From: Kevin Wolf <kwolf@redhat.com> +Date: Wed, 3 Jun 2015 14:41:27 +0200 +Subject: [PATCH 3/3] ide: Clear DRQ after handling all expected accesses + +This is additional hardening against an end_transfer_func that fails to +clear the DRQ status bit. The bit must be unset as soon as the PIO +transfer has completed, so it's better to do this in a central place +instead of duplicating the code in all commands (and forgetting it in +some). + +Signed-off-by: Kevin Wolf <kwolf@redhat.com> +--- + hw/ide/core.c | 16 ++++++++++++---- + 1 file changed, 12 insertions(+), 4 deletions(-) + +diff --git a/hw/ide/core.c b/hw/ide/core.c +index 44fcc23..50449ca 100644 +--- a/hw/ide/core.c ++++ b/hw/ide/core.c +@@ -2028,8 +2028,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val) + *(uint16_t *)p = le16_to_cpu(val); + p += 2; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + } + + uint32_t ide_data_readw(void *opaque, uint32_t addr) +@@ -2053,8 +2055,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr) + ret = cpu_to_le16(*(uint16_t *)p); + p += 2; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + return ret; + } + +@@ -2078,8 +2082,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val) + *(uint32_t *)p = le32_to_cpu(val); + p += 4; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + } + + uint32_t ide_data_readl(void *opaque, uint32_t addr) +@@ -2103,8 +2109,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr) + ret = cpu_to_le32(*(uint32_t *)p); + p += 4; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + return ret; + } + +-- +1.8.3.1 + diff --git a/gnu/packages/patches/qemu-CVE-2015-5158.patch b/gnu/packages/patches/qemu-CVE-2015-5158.patch new file mode 100644 index 0000000000..bedbfc8fa4 --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-5158.patch @@ -0,0 +1,45 @@ +c170aad8b057223b1139d72e5ce7acceafab4fa9 +Author: Paolo Bonzini <pbonzini@redhat.com> +Date: Tue Jul 21 08:59:39 2015 +0200 + + scsi: fix buffer overflow in scsi_req_parse_cdb (CVE-2015-5158) + + This is a guest-triggerable buffer overflow present in QEMU 2.2.0 + and newer. scsi_cdb_length returns -1 as an error value, but the + caller does not check it. + + Luckily, the massive overflow means that QEMU will just SIGSEGV, + making the impact much smaller. + + Reported-by: Zhu Donghai (朱东海) <donghai.zdh@alibaba-inc.com> + Fixes: 1894df02811f6b79ea3ffbf1084599d96f316173 + Reviewed-by: Fam Zheng <famz@redhat.com> + Cc: qemu-stable@nongnu.org + Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> + +1 file changed, 6 insertions(+), 1 deletion(-) + hw/scsi/scsi-bus.c | 7 ++++++- + + Modified hw/scsi/scsi-bus.c +diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c +index f50b2f0..f0ae462 100644 +--- a/hw/scsi/scsi-bus.c ++++ b/hw/scsi/scsi-bus.c +@@ -1239,10 +1239,15 @@ int scsi_cdb_length(uint8_t *buf) { + int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf) + { + int rc; ++ int len; + + cmd->lba = -1; +- cmd->len = scsi_cdb_length(buf); ++ len = scsi_cdb_length(buf); ++ if (len < 0) { ++ return -1; ++ } + ++ cmd->len = len; + switch (dev->type) { + case TYPE_TAPE: + rc = scsi_req_stream_xfer(cmd, dev, buf); + |