community/sox: backport a few CVEs

Thanks to Arch Linux for doing most of the hard work

resolves #10522

1 files changed, 34 insertions, 0 deletions

diff --git a/community/sox/CVE-2017-18189.patch b/community/sox/CVE-2017-18189.patch
new file mode 100644
index 0000000000..1e34205bb7
--- /dev/null
+++ b/community/sox/CVE-2017-18189.patch
@@ -0,0 +1,34 @@
+From 09d7388c8ad5701ed9c59d1d600ff6154b066397 Mon Sep 17 00:00:00 2001
+From: Mans Rullgard <mans@mansr.com>
+Date: Thu, 9 Nov 2017 11:45:10 +0000
+Subject: [PATCH] xa: validate channel count (CVE-2017-18189)
+
+A corrupt header specifying zero channels would send read_channels()
+into an infinite loop.  Prevent this by sanity checking the channel
+count in open_read().  Also add an upper bound to prevent overflow
+in multiplication.
+---
+ src/xa.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/src/xa.c b/src/xa.c
+index 81a76772..9fc086ec 100644
+--- a/src/xa.c
++++ b/src/xa.c
+@@ -143,6 +143,12 @@ static int startread(sox_format_t * ft)
+         lsx_report("User options overriding rate read in .xa header");
+     }
+ 
++    if (ft->signal.channels == 0 || ft->signal.channels > UINT16_MAX) {
++        lsx_fail_errno(ft, SOX_EFMT, "invalid channel count %d",
++                       ft->signal.channels);
++        return SOX_EOF;
++    }
++
+     /* Check for supported formats */
+     if (ft->encoding.bits_per_sample != 16) {
+         lsx_fail_errno(ft, SOX_EFMT, "%d-bit sample resolution not supported.",
+-- 
+2.22.0
+
+