From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1692 invoked by alias); 26 Feb 2018 23:03:32 -0000 Mailing-List: contact elfutils-devel-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Post: List-Help: List-Subscribe: Sender: elfutils-devel-owner@sourceware.org Received: (qmail 1504 invoked by uid 48); 26 Feb 2018 23:03:28 -0000 From: "mark at klomp dot org" To: elfutils-devel@sourceware.org Subject: [Bug tools/22865] [objdump] Arbitrary memory write in default_syscall_abi of eblopenbackend.c. Date: Mon, 26 Feb 2018 23:03:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: elfutils X-Bugzilla-Component: tools X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mark at klomp dot org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: 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-SW-Source: 2018-q1/txt/msg00059.txt.bz2 https://sourceware.org/bugzilla/show_bug.cgi?id=3D22865 Mark Wielaard changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mark at klomp dot org --- Comment #2 from Mark Wielaard --- Could you give a bit more information on how you build and run eu-objdump? I am unable to replicate your results with the given poc. It simply works as intended: $ eu-objdump -d ./b ./b: elf64-elf_x86_64 Disassembly of section .fini: aaaaaaaa: 48 83 ec 08 sub $0x8,%rsp aaaaaaae: 48 83 c4 08 add $0x8,%rsp aaaaaab2: c3 retq Also it is somewhat surprising it crashes for you inside default_syscall_ab= i () because that doesn't seem to be called. Which indicates the error is somewh= ere else. --=20 You are receiving this mail because: You are on the CC list for the bug.