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Fix CVE-2017-14166:
https://github.com/libarchive/libarchive/issues/935
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14166
Patch copied from upstream source repository:
https://github.com/libarchive/libarchive/commit/fa7438a0ff4033e4741c807394a9af6207940d71
From fa7438a0ff4033e4741c807394a9af6207940d71 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@bec.de>
Date: Tue, 5 Sep 2017 18:12:19 +0200
Subject: [PATCH] Do something sensible for empty strings to make fuzzers
happy.
---
libarchive/archive_read_support_format_xar.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libarchive/archive_read_support_format_xar.c b/libarchive/archive_read_support_format_xar.c
index 7a22beb9d..93eeacc5e 100644
--- a/libarchive/archive_read_support_format_xar.c
+++ b/libarchive/archive_read_support_format_xar.c
@@ -1040,6 +1040,9 @@ atol10(const char *p, size_t char_cnt)
uint64_t l;
int digit;
+ if (char_cnt == 0)
+ return (0);
+
l = 0;
digit = *p - '0';
while (digit >= 0 && digit < 10 && char_cnt-- > 0) {
@@ -1054,7 +1057,10 @@ atol8(const char *p, size_t char_cnt)
{
int64_t l;
int digit;
-
+
+ if (char_cnt == 0)
+ return (0);
+
l = 0;
while (char_cnt-- > 0) {
if (*p >= '0' && *p <= '7')
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