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Date: Sat, 21 Oct 2017 19:19:46 +0100
From: Eddie Chapman <eddie@...k.net>
To: oss-security@...ts.openwall.com
Subject: CVE-2017-15670, CVE-2017-15671 glibc: Buffer overflow and memory leak
in glob with GLOB_TILDE
Just a heads up for anyone around over the weekend ...
== CVE-2017-15670 ==
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15670
"The GNU C Library (aka glibc or libc6) before 2.27 contains an
off-by-one error leading to a heap-based buffer overflow in the glob
function in glob.c, related to the processing of home directories using
the ~ operator followed by a long string."
https://sourceware.org/bugzilla/show_bug.cgi?id=22320
https://bugzilla.redhat.com/show_bug.cgi?id=1504804
"It is possible that an attacker might use this to escalate his
privileges or execute code."
Upstream patch:
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=2d1bd71ec70a31b01d01b734faa66bb1ed28961f
== CVE-2017-15671 ==
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15671
"The glob function in glob.c in the GNU C Library (aka glibc or libc6)
before 2.27, when invoked with GLOB_TILDE, could skip freeing allocated
memory when processing the ~ operator with a long user name, potentially
leading to a denial of service (memory leak)."
https://sourceware.org/bugzilla/show_bug.cgi?id=22325
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15671
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