From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85A83C3A5A7 for ; Thu, 8 Dec 2022 09:24:04 +0000 (UTC) Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by mx.groups.io with SMTP id smtpd.web11.9327.1670491439398441611 for ; Thu, 08 Dec 2022 01:24:00 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@bootlin.com header.s=gm1 header.b=a7YZQ2Nd; spf=pass (domain: bootlin.com, ip: 217.70.183.201, mailfrom: alexandre.belloni@bootlin.com) Received: (Authenticated sender: alexandre.belloni@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id CBBAF1BF204; Thu, 8 Dec 2022 09:23:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670491437; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=EpY3HuolKUUEO8geKNN4SbRuydYrIkTIeBVQgHjnyQc=; b=a7YZQ2Nd0jmD5pWAyrQ83vHsR3KStku/lmCxLM1XCZ76/iAPaCDF7Orq9yRlNIQeuKUEXk 1Tha2iWJ4BMPRDTAvIuzeVHPvbDr5RkScyp6r4xZVuyz82WAVTJ6Up0MNCwjo9uBRaRMQm MwfjNtHB2SLR+MjNfKAURHhGWLDWB++m9Z8Rd6zWv7HJOQHOrOAlIKbiyQx0Et0u/Vi8CM kwpHUhsFd7IANqM2ygrFhD5a4sxkMqBXixQW40QffSJXdek858Qd7Mn90jQ4T5+BOA1+/6 p5w98Vprg8hNwR88d34tYDKolmwQvg/hZWKrNwVd6vGaSy3cRMVtoJb2wrn18w== Date: Thu, 8 Dec 2022 10:23:54 +0100 From: Alexandre Belloni To: Manoj Saun Cc: openembedded-core@lists.openembedded.org, narpat.mali@windriver.com Subject: Re: [OE-core] [meta-core][PATCH 1/1] libksba: fix CVE-2022-3515 Message-ID: References: <20221208062744.3450638-1-manojsingh.saun@windriver.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221208062744.3450638-1-manojsingh.saun@windriver.com> List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 08 Dec 2022 09:24:04 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/174393 Hello, On 08/12/2022 06:27:44+0000, Manoj Saun wrote: > libksba: integer overflow may lead to remote code execution. > > Reference: > https://www.gnupg.org/blog/20221017-pepe-left-the-ksba.html > > Upstream fixes: > https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=4b7d9cd4a018898d7714ce06f3faf2626c14582b > The patch is missing Upstream-Status: Missing Upstream-Status tag (meta/recipes-support/libksba/libksba/0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch) > Signed-off-by: Manoj Saun > --- > ...e-overflow-directly-in-the-TLV-parse.patch | 42 +++++++++++++++++++ > meta/recipes-support/libksba/libksba_1.6.2.bb | 3 +- > 2 files changed, 44 insertions(+), 1 deletion(-) > create mode 100644 meta/recipes-support/libksba/libksba/0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch > > diff --git a/meta/recipes-support/libksba/libksba/0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch b/meta/recipes-support/libksba/libksba/0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch > new file mode 100644 > index 0000000000..e2cb842a4d > --- /dev/null > +++ b/meta/recipes-support/libksba/libksba/0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch > @@ -0,0 +1,42 @@ > +From 4b7d9cd4a018898d7714ce06f3faf2626c14582b Mon Sep 17 00:00:00 2001 > +From: Werner Koch > +Date: Wed, 5 Oct 2022 14:19:06 +0200 > +Subject: [PATCH] Detect a possible overflow directly in the TLV parser. > + > +* src/ber-help.c (_ksba_ber_read_tl): Check for overflow of a commonly > +used sum. > +-- > + > +It is quite common to have checks like > + > + if (ti.nhdr + ti.length >= DIM(tmpbuf)) > + return gpg_error (GPG_ERR_TOO_LARGE); > + > +This patch detects possible integer overflows immmediately when > +creating the TI object. > + > +Reported-by: ZDI-CAN-18927, ZDI-CAN-18928, ZDI-CAN-18929 > +--- > + src/ber-help.c | 6 ++++++ > + 1 file changed, 6 insertions(+) > + > +diff --git a/src/ber-help.c b/src/ber-help.c > +index 81c31ed..56efb6a 100644 > +--- a/src/ber-help.c > ++++ b/src/ber-help.c > +@@ -182,6 +182,12 @@ _ksba_ber_read_tl (ksba_reader_t reader, struct tag_info *ti) > + ti->length = len; > + } > + > ++ if (ti->length > ti->nhdr && (ti->nhdr + ti->length) < ti->length) > ++ { > ++ ti->err_string = "header+length would overflow"; > ++ return gpg_error (GPG_ERR_EOVERFLOW); > ++ } > ++ > + /* Without this kludge some example certs can't be parsed */ > + if (ti->class == CLASS_UNIVERSAL && !ti->tag) > + ti->length = 0; > +-- > +2.34.1 > + > diff --git a/meta/recipes-support/libksba/libksba_1.6.2.bb b/meta/recipes-support/libksba/libksba_1.6.2.bb > index f6ecb9aec4..c25c23ef0f 100644 > --- a/meta/recipes-support/libksba/libksba_1.6.2.bb > +++ b/meta/recipes-support/libksba/libksba_1.6.2.bb > @@ -22,7 +22,8 @@ inherit autotools binconfig-disabled pkgconfig texinfo > > UPSTREAM_CHECK_URI = "https://gnupg.org/download/index.html" > SRC_URI = "${GNUPG_MIRROR}/${BPN}/${BPN}-${PV}.tar.bz2 \ > - file://ksba-add-pkgconfig-support.patch" > + file://ksba-add-pkgconfig-support.patch \ > + file://0001-Detect-a-possible-overflow-directly-in-the-TLV-parse.patch" > > SRC_URI[sha256sum] = "fce01ccac59812bddadffacff017dac2e4762bdb6ebc6ffe06f6ed4f6192c971" > > -- > 2.34.1 > > > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > View/Reply Online (#174384): https://lists.openembedded.org/g/openembedded-core/message/174384 > Mute This Topic: https://lists.openembedded.org/mt/95533228/3617179 > Group Owner: openembedded-core+owner@lists.openembedded.org > Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [alexandre.belloni@bootlin.com] > -=-=-=-=-=-=-=-=-=-=-=- > -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com