diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2015-5158.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5158.patch | 45 |
1 files changed, 45 insertions, 0 deletions
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 <[email protected]> +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) <[email protected]> + Fixes: 1894df02811f6b79ea3ffbf1084599d96f316173 + Reviewed-by: Fam Zheng <[email protected]> + Cc: [email protected] + Signed-off-by: Paolo Bonzini <[email protected]> + +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); + |