Package: guix-patches;
Reported by: Leo Famulari <leo <at> famulari.name>
Date: Tue, 21 Jan 2020 18:57:02 UTC
Severity: normal
Tags: patch
Done: Leo Famulari <leo <at> famulari.name>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: help-debbugs <at> gnu.org (GNU bug Tracking System) To: Leo Famulari <leo <at> famulari.name> Subject: bug#39226: closed (Re: [PATCH 0/2] QEMU updates) Date: Sat, 25 Jan 2020 02:15:02 +0000
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Your bug report
#39225: [PATCH 1/2] gnu: QEMU: Fix CVE-2020-{7039,7211}.
which was filed against the guix-patches package, has been closed.
The explanation is attached below, along with your original report.
If you require more details, please reply to 39226 <at> debbugs.gnu.org.
--
39225: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=39225
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
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From: Leo Famulari <leo <at> famulari.name> To: 39225-done <at> debbugs.gnu.org Subject: Re: [PATCH 0/2] QEMU updates Date: Fri, 24 Jan 2020 21:13:59 -0500[Message part 3 (text/plain, inline)]On Tue, Jan 21, 2020 at 01:55:50PM -0500, Leo Famulari wrote: > The security updates work with our current QEMU package of 4.1.1 as well > as 4.2.0. > > I tested both 4.2.0 and the patched 4.1.1 by creating a vm-image and > running it with the "full" QEMU package, and the SLIRP networking works > fine in both cases. Pushed as 3778b3d9d013a443eec7990c31f47f887f72fe59, along with a 3rd patch that brings back the QEMU man pages. QEMU 4.0 began requiring the use of Sphinx to build them: https://wiki.qemu.org/ChangeLog/4.0#Build_Dependencies[signature.asc (application/pgp-signature, inline)]
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From: Leo Famulari <leo <at> famulari.name> To: guix-patches <at> gnu.org Subject: [PATCH 1/2] gnu: QEMU: Fix CVE-2020-{7039,7211}. Date: Tue, 21 Jan 2020 13:55:51 -0500* gnu/packages/patches/qemu-CVE-2020-7039.patch, gnu/packages/patches/qemu-CVE-2020-7211.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/virtualization.scm (qemu)[source]: Use them. --- gnu/local.mk | 2 + gnu/packages/patches/qemu-CVE-2020-7039.patch | 173 ++++++++++++++++++ gnu/packages/patches/qemu-CVE-2020-7211.patch | 49 +++++ gnu/packages/virtualization.scm | 2 + 4 files changed, 226 insertions(+) create mode 100644 gnu/packages/patches/qemu-CVE-2020-7039.patch create mode 100644 gnu/packages/patches/qemu-CVE-2020-7211.patch diff --git a/gnu/local.mk b/gnu/local.mk index 626d91ce62..1a01a87c40 100644 --- a/gnu/local.mk +++ b/gnu/local.mk @@ -1334,6 +1334,8 @@ dist_patch_DATA = \ %D%/packages/patches/python-unittest2-remove-argparse.patch \ %D%/packages/patches/python-waitress-fix-tests.patch \ %D%/packages/patches/qemu-glibc-2.27.patch \ + %D%/packages/patches/qemu-CVE-2020-7039.patch \ + %D%/packages/patches/qemu-CVE-2020-7211.patch \ %D%/packages/patches/qt4-ldflags.patch \ %D%/packages/patches/qtbase-use-TZDIR.patch \ %D%/packages/patches/qtscript-disable-tests.patch \ diff --git a/gnu/packages/patches/qemu-CVE-2020-7039.patch b/gnu/packages/patches/qemu-CVE-2020-7039.patch new file mode 100644 index 0000000000..ffebda68ab --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2020-7039.patch @@ -0,0 +1,173 @@ +Fix CVE-2020-7039: + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7039 + +Patches copied from upstream dependency repository: + +https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289 +https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9 +https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80 + +From 2655fffed7a9e765bcb4701dd876e9dab975f289 Mon Sep 17 00:00:00 2001 +From: Samuel Thibault <samuel.thibault <at> ens-lyon.org> +Date: Wed, 8 Jan 2020 00:58:48 +0100 +Subject: [PATCH] tcp_emu: Fix oob access + +The main loop only checks for one available byte, while we sometimes +need two bytes. +--- + CHANGELOG.md | 1 + + src/tcp_subr.c | 7 +++++++ + 2 files changed, 8 insertions(+) + +#diff --git a/CHANGELOG.md b/CHANGELOG.md +#index 00d0ce2..5cf94a8 100644 +#--- a/CHANGELOG.md +#+++ b/CHANGELOG.md +#@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0 +# ### Fixed +# +# - ncsi: fix checksum OOB memory access +#+ - `tcp_emu()`: fix OOB accesses +# +# ## [4.1.0] - 2019-12-02 +# +diff --git a/src/tcp_subr.c b/src/tcp_subr.c +index 382aa38..9c1bdec 100644 +--- a/slirp/src/tcp_subr.c ++++ b/slirp/src/tcp_subr.c +@@ -871,6 +871,9 @@ int tcp_emu(struct socket *so, struct mbuf *m) + break; + + case 5: ++ if (bptr == m->m_data + m->m_len - 1) ++ return 1; /* We need two bytes */ ++ + /* + * The difference between versions 1.0 and + * 2.0 is here. For future versions of +@@ -886,6 +889,10 @@ int tcp_emu(struct socket *so, struct mbuf *m) + /* This is the field containing the port + * number that RA-player is listening to. + */ ++ ++ if (bptr == m->m_data + m->m_len - 1) ++ return 1; /* We need two bytes */ ++ + lport = (((uint8_t *)bptr)[0] << 8) + ((uint8_t *)bptr)[1]; + if (lport < 6970) + lport += 256; /* don't know why */ +-- +2.24.1 + +From ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9 Mon Sep 17 00:00:00 2001 +From: Prasad J Pandit <pjp <at> fedoraproject.org> +Date: Thu, 9 Jan 2020 15:12:27 +0530 +Subject: [PATCH] slirp: use correct size while emulating IRC commands + +While emulating IRC DCC commands, tcp_emu() uses 'mbuf' size +'m->m_size' to write DCC commands via snprintf(3). This may +lead to OOB write access, because 'bptr' points somewhere in +the middle of 'mbuf' buffer, not at the start. Use M_FREEROOM(m) +size to avoid OOB access. + +Reported-by: Vishnu Dev TJ <vishnudevtj <at> gmail.com> +Signed-off-by: Prasad J Pandit <pjp <at> fedoraproject.org> +Reviewed-by: Samuel Thibault <samuel.thibault <at> ens-lyon.org> +Message-Id: <20200109094228.79764-2-ppandit <at> redhat.com> +--- + src/tcp_subr.c | 11 ++++++----- + 1 file changed, 6 insertions(+), 5 deletions(-) + +diff --git a/src/tcp_subr.c b/src/tcp_subr.c +index 9c1bdec..ee7a938 100644 +--- a/slirp/src/tcp_subr.c ++++ b/slirp/src/tcp_subr.c +@@ -763,7 +763,8 @@ int tcp_emu(struct socket *so, struct mbuf *m) + return 1; + } + m->m_len = bptr - m->m_data; /* Adjust length */ +- m->m_len += snprintf(bptr, m->m_size, "DCC CHAT chat %lu %u%c\n", ++ m->m_len += snprintf(bptr, M_FREEROOM(m), ++ "DCC CHAT chat %lu %u%c\n", + (unsigned long)ntohl(so->so_faddr.s_addr), + ntohs(so->so_fport), 1); + } else if (sscanf(bptr, "DCC SEND %256s %u %u %u", buff, &laddr, &lport, +@@ -773,8 +774,8 @@ int tcp_emu(struct socket *so, struct mbuf *m) + return 1; + } + m->m_len = bptr - m->m_data; /* Adjust length */ +- m->m_len += +- snprintf(bptr, m->m_size, "DCC SEND %s %lu %u %u%c\n", buff, ++ m->m_len += snprintf(bptr, M_FREEROOM(m), ++ "DCC SEND %s %lu %u %u%c\n", buff, + (unsigned long)ntohl(so->so_faddr.s_addr), + ntohs(so->so_fport), n1, 1); + } else if (sscanf(bptr, "DCC MOVE %256s %u %u %u", buff, &laddr, &lport, +@@ -784,8 +785,8 @@ int tcp_emu(struct socket *so, struct mbuf *m) + return 1; + } + m->m_len = bptr - m->m_data; /* Adjust length */ +- m->m_len += +- snprintf(bptr, m->m_size, "DCC MOVE %s %lu %u %u%c\n", buff, ++ m->m_len += snprintf(bptr, M_FREEROOM(m), ++ "DCC MOVE %s %lu %u %u%c\n", buff, + (unsigned long)ntohl(so->so_faddr.s_addr), + ntohs(so->so_fport), n1, 1); + } +-- +2.24.1 + +From 82ebe9c370a0e2970fb5695aa19aa5214a6a1c80 Mon Sep 17 00:00:00 2001 +From: Prasad J Pandit <pjp <at> fedoraproject.org> +Date: Thu, 9 Jan 2020 15:12:28 +0530 +Subject: [PATCH] slirp: use correct size while emulating commands + +While emulating services in tcp_emu(), it uses 'mbuf' size +'m->m_size' to write commands via snprintf(3). Use M_FREEROOM(m) +size to avoid possible OOB access. + +Signed-off-by: Prasad J Pandit <pjp <at> fedoraproject.org> +Signed-off-by: Samuel Thibault <samuel.thibault <at> ens-lyon.org> +Message-Id: <20200109094228.79764-3-ppandit <at> redhat.com> +--- + src/tcp_subr.c | 9 ++++----- + 1 file changed, 4 insertions(+), 5 deletions(-) + +diff --git a/src/tcp_subr.c b/src/tcp_subr.c +index ee7a938..177dfd2 100644 +--- a/slirp/src/tcp_subr.c ++++ b/slirp/src/tcp_subr.c +@@ -681,7 +681,7 @@ int tcp_emu(struct socket *so, struct mbuf *m) + n4 = (laddr & 0xff); + + m->m_len = bptr - m->m_data; /* Adjust length */ +- m->m_len += snprintf(bptr, m->m_size - m->m_len, ++ m->m_len += snprintf(bptr, M_FREEROOM(m), + "ORT %d,%d,%d,%d,%d,%d\r\n%s", n1, n2, n3, n4, + n5, n6, x == 7 ? buff : ""); + return 1; +@@ -716,8 +716,7 @@ int tcp_emu(struct socket *so, struct mbuf *m) + n4 = (laddr & 0xff); + + m->m_len = bptr - m->m_data; /* Adjust length */ +- m->m_len += +- snprintf(bptr, m->m_size - m->m_len, ++ m->m_len += snprintf(bptr, M_FREEROOM(m), + "27 Entering Passive Mode (%d,%d,%d,%d,%d,%d)\r\n%s", + n1, n2, n3, n4, n5, n6, x == 7 ? buff : ""); + +@@ -743,8 +742,8 @@ int tcp_emu(struct socket *so, struct mbuf *m) + if (m->m_data[m->m_len - 1] == '\0' && lport != 0 && + (so = tcp_listen(slirp, INADDR_ANY, 0, so->so_laddr.s_addr, + htons(lport), SS_FACCEPTONCE)) != NULL) +- m->m_len = +- snprintf(m->m_data, m->m_size, "%d", ntohs(so->so_fport)) + 1; ++ m->m_len = snprintf(m->m_data, M_ROOM(m), ++ "%d", ntohs(so->so_fport)) + 1; + return 1; + + case EMU_IRC: +-- +2.24.1 + diff --git a/gnu/packages/patches/qemu-CVE-2020-7211.patch b/gnu/packages/patches/qemu-CVE-2020-7211.patch new file mode 100644 index 0000000000..2885dda411 --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2020-7211.patch @@ -0,0 +1,49 @@ +Fix CVE-2020-7211: + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7211 + +Patch copied from upstream dependency repository: + +https://gitlab.freedesktop.org/slirp/libslirp/commit/14ec36e107a8c9af7d0a80c3571fe39b291ff1d4 + +From 14ec36e107a8c9af7d0a80c3571fe39b291ff1d4 Mon Sep 17 00:00:00 2001 +From: Prasad J Pandit <pjp <at> fedoraproject.org> +Date: Mon, 13 Jan 2020 17:44:31 +0530 +Subject: [PATCH] slirp: tftp: restrict relative path access + +tftp restricts relative or directory path access on Linux systems. +Apply same restrictions on Windows systems too. It helps to avoid +directory traversal issue. + +Fixes: https://bugs.launchpad.net/qemu/+bug/1812451 +Reported-by: Peter Maydell <peter.maydell <at> linaro.org> +Signed-off-by: Prasad J Pandit <pjp <at> fedoraproject.org> +Reviewed-by: Samuel Thibault <samuel.thibault <at> ens-lyon.org> +Message-Id: <20200113121431.156708-1-ppandit <at> redhat.com> +--- + src/tftp.c | 9 +++++++-- + 1 file changed, 7 insertions(+), 2 deletions(-) + +diff --git a/src/tftp.c b/src/tftp.c +index 093c2e0..e52e71b 100644 +--- a/slirp/src/tftp.c ++++ b/slirp/src/tftp.c +@@ -344,8 +344,13 @@ static void tftp_handle_rrq(Slirp *slirp, struct sockaddr_storage *srcsas, + k += 6; /* skipping octet */ + + /* do sanity checks on the filename */ +- if (!strncmp(req_fname, "../", 3) || +- req_fname[strlen(req_fname) - 1] == '/' || strstr(req_fname, "/../")) { ++ if ( ++#ifdef G_OS_WIN32 ++ strstr(req_fname, "..\\") || ++ req_fname[strlen(req_fname) - 1] == '\\' || ++#endif ++ strstr(req_fname, "../") || ++ req_fname[strlen(req_fname) - 1] == '/') { + tftp_send_error(spt, 2, "Access violation", tp); + return; + } +-- +2.24.1 + diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm index 51ba3c602a..1874cf3d9f 100644 --- a/gnu/packages/virtualization.scm +++ b/gnu/packages/virtualization.scm @@ -114,6 +114,8 @@ (method url-fetch) (uri (string-append "https://download.qemu.org/qemu-" version ".tar.xz")) + (patches (search-patches "qemu-CVE-2020-7039.patch" + "qemu-CVE-2020-7211.patch")) (sha256 (base32 "1lm1jndfpc5sydwrxyiz5sms414zkcg9jdl0zx318qbjsayxnvzd")))) -- 2.25.0
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