From owner-svn-src-head@freebsd.org Wed Nov 15 22:30:22 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4B1CBDE90FD; Wed, 15 Nov 2017 22:30:22 +0000 (UTC) (envelope-from gordon@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 250937E766; Wed, 15 Nov 2017 22:30:22 +0000 (UTC) (envelope-from gordon@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id vAFMUL1N001846; Wed, 15 Nov 2017 22:30:21 GMT (envelope-from gordon@FreeBSD.org) Received: (from gordon@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id vAFMULUg001844; Wed, 15 Nov 2017 22:30:21 GMT (envelope-from gordon@FreeBSD.org) Message-Id: <201711152230.vAFMULUg001844@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gordon set sender to gordon@FreeBSD.org using -f From: Gordon Tetlow Date: Wed, 15 Nov 2017 22:30:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r325865 - in head/sys: compat/freebsd32 kern X-SVN-Group: head X-SVN-Commit-Author: gordon X-SVN-Commit-Paths: in head/sys: compat/freebsd32 kern X-SVN-Commit-Revision: 325865 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Nov 2017 22:30:22 -0000 Author: gordon Date: Wed Nov 15 22:30:21 2017 New Revision: 325865 URL: https://svnweb.freebsd.org/changeset/base/325865 Log: Properly bzero kldstat structure to prevent kernel information leak. Submitted by: kib Reported by: TJ Corley Security: CVE-2017-1088 Modified: head/sys/compat/freebsd32/freebsd32_misc.c head/sys/kern/kern_linker.c Modified: head/sys/compat/freebsd32/freebsd32_misc.c ============================================================================== --- head/sys/compat/freebsd32/freebsd32_misc.c Wed Nov 15 22:13:10 2017 (r325864) +++ head/sys/compat/freebsd32/freebsd32_misc.c Wed Nov 15 22:30:21 2017 (r325865) @@ -3331,8 +3331,8 @@ freebsd32_copyout_strings(struct image_params *imgp) int freebsd32_kldstat(struct thread *td, struct freebsd32_kldstat_args *uap) { - struct kld_file_stat stat; - struct kld32_file_stat stat32; + struct kld_file_stat *stat; + struct kld32_file_stat *stat32; int error, version; if ((error = copyin(&uap->stat->version, &version, sizeof(version))) @@ -3342,17 +3342,22 @@ freebsd32_kldstat(struct thread *td, struct freebsd32_ version != sizeof(struct kld32_file_stat)) return (EINVAL); - error = kern_kldstat(td, uap->fileid, &stat); - if (error != 0) - return (error); - - bcopy(&stat.name[0], &stat32.name[0], sizeof(stat.name)); - CP(stat, stat32, refs); - CP(stat, stat32, id); - PTROUT_CP(stat, stat32, address); - CP(stat, stat32, size); - bcopy(&stat.pathname[0], &stat32.pathname[0], sizeof(stat.pathname)); - return (copyout(&stat32, uap->stat, version)); + stat = malloc(sizeof(*stat), M_TEMP, M_WAITOK | M_ZERO); + stat32 = malloc(sizeof(*stat32), M_TEMP, M_WAITOK | M_ZERO); + error = kern_kldstat(td, uap->fileid, stat); + if (error == 0) { + bcopy(&stat->name[0], &stat32->name[0], sizeof(stat->name)); + CP(*stat, *stat32, refs); + CP(*stat, *stat32, id); + PTROUT_CP(*stat, *stat32, address); + CP(*stat, *stat32, size); + bcopy(&stat->pathname[0], &stat32->pathname[0], + sizeof(stat->pathname)); + error = copyout(stat32, uap->stat, version); + } + free(stat, M_TEMP); + free(stat32, M_TEMP); + return (error); } int Modified: head/sys/kern/kern_linker.c ============================================================================== --- head/sys/kern/kern_linker.c Wed Nov 15 22:13:10 2017 (r325864) +++ head/sys/kern/kern_linker.c Wed Nov 15 22:30:21 2017 (r325865) @@ -1229,7 +1229,7 @@ out: int sys_kldstat(struct thread *td, struct kldstat_args *uap) { - struct kld_file_stat stat; + struct kld_file_stat *stat; int error, version; /* @@ -1242,10 +1242,12 @@ sys_kldstat(struct thread *td, struct kldstat_args *ua version != sizeof(struct kld_file_stat)) return (EINVAL); - error = kern_kldstat(td, uap->fileid, &stat); - if (error != 0) - return (error); - return (copyout(&stat, uap->stat, version)); + stat = malloc(sizeof(*stat), M_TEMP, M_WAITOK | M_ZERO); + error = kern_kldstat(td, uap->fileid, stat); + if (error == 0) + error = copyout(stat, uap->stat, version); + free(stat, M_TEMP); + return (error); } int