From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 3AE0C3938C30; Fri, 18 Dec 2020 16:04:54 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3AE0C3938C30
From: "siddhesh at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/27083] Unsafe unbounded alloca in addmntent
Date: Fri, 18 Dec 2020 16:04:54 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: siddhesh at sourceware dot org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: siddhesh at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: security-
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-27083-131-MAZ52sR6Yj@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-27083-131@http.sourceware.org/bugzilla/>
References: <bug-27083-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Dec 2020 16:04:54 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D27083

--- Comment #2 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
To elaborate on my previous comment, the glibc Security Process[1] specifies
that stack overflows due to an unbounded alloca may be considered a security
issue if the data triggering the overflow could come from an untrusted sour=
ce.=20
Our assessment is that this is not true for addmntent, i.e. applications us=
ing
addmntent already run in a trusted context.  We can revisit this if it is f=
ound
that this is not true.

[1] https://sourceware.org/glibc/wiki/Security%20Process

--=20
You are receiving this mail because:
You are on the CC list for the bug.=