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From a76376df7c07e577a9515c3faa5dbd50bda5da07 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 20 Oct 2017 18:41:14 +0200
Subject: [PATCH] CVE-2017-15670: glob: Fix one-byte overflow [BZ #22320]
(cherry picked from commit c369d66e5426a30e4725b100d5cd28e372754f90)
Upstream-Status: Backport
CVE: CVE-2017-15670
Affects: glibc < 2.27
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
ChangeLog | 6 ++++++
NEWS | 5 +++++
posix/glob.c | 2 +-
3 files changed, 12 insertions(+), 1 deletion(-)
Index: git/NEWS
===================================================================
--- git.orig/NEWS
+++ git/NEWS
@@ -206,6 +206,11 @@ Security related changes:
* A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
fixed (CVE-2017-12133).
+ CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
+ suffered from a one-byte overflow during ~ operator processing (either
+ on the stack or the heap, depending on the length of the user name).
+ Reported by Tim Rühsen.
+
The following bugs are resolved with this release:
[984] network: Respond to changed resolv.conf in gethostbyname
Index: git/posix/glob.c
===================================================================
--- git.orig/posix/glob.c
+++ git/posix/glob.c
@@ -843,7 +843,7 @@ glob (const char *pattern, int flags, in
*p = '\0';
}
else
- *((char *) mempcpy (newp, dirname + 1, end_name - dirname))
+ *((char *) mempcpy (newp, dirname + 1, end_name - dirname - 1))
= '\0';
user_name = newp;
}
Index: git/ChangeLog
===================================================================
--- git.orig/ChangeLog
+++ git/ChangeLog
@@ -1,3 +1,9 @@
+2017-10-20 Paul Eggert <eggert@cs.ucla.edu>
+
+ [BZ #22320]
+ CVE-2017-15670
+ * posix/glob.c (__glob): Fix one-byte overflow.
+
2017-08-02 Siddhesh Poyarekar <siddhesh@sourceware.org>
* version.h (RELEASE): Set to "stable"
|
