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Xin LI 2015-08-05 22:18:29 +00:00
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
=============================================================================
FreeBSD-SA-15:18.bsdpatch Security Advisory
The FreeBSD Project
Topic: shell injection vulnerability in patch(1)
Category: contrib
Module: patch
Announced: 2015-08-05
Credits: Martin Natano
Affects: FreeBSD 10.x.
Corrected: 2015-08-05 22:05:02 UTC (stable/10, 10.2-PRERELEASE)
2015-08-05 22:05:02 UTC (stable/10, 10.2-BETA2-p3)
2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC1-p2)
2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC2-p1)
2015-08-05 22:05:18 UTC (releng/10.1, 10.1-RELEASE-p17)
CVE Name: CVE-2015-1418
For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:https://security.FreeBSD.org/>.
I. Background
The patch(1) utility takes a patch file produced by the diff(1) program and
apply the differences to an original file, producing a patched version.
The patch(1) utility supports patches that uses ed(1) script format, as
required by the POSIX.1-2008 standard.
ed(1) is a line-oriented text editor.
II. Problem Description
Due to insufficient sanitization of the input patch stream, it is possible
for a patch file to cause patch(1) to pass certain ed(1) scripts to the
ed(1) editor, which would run commands.
III. Impact
This issue could be exploited to execute arbitrary commands as the user
invoking patch(1) against a specically crafted patch file, which could be
leveraged to obtain elevated privileges.
IV. Workaround
No workaround is available, but systems where a privileged user does not
make use of patches without proper validation are not affected.
V. Solution
Perform one of the following:
1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.
A reboot is not required after updating.
2) To update your vulnerable system via a binary patch:
Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:
# freebsd-update fetch
# freebsd-update install
A reboot is not required after updating.
3) To update your vulnerable system via a source code patch:
The following patches have been verified to apply to the applicable
FreeBSD release branches.
a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.
# fetch https://security.FreeBSD.org/patches/SA-15:18/bsdpatch.patch
# fetch https://security.FreeBSD.org/patches/SA-15:18/bsdpatch.patch.asc
# gpg --verify bsdpatch.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/patch
c) Recompile the operating system using buildworld and installworld as
described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r286348
releng/10.1/ r286351
releng/10.2/ r286350
- -------------------------------------------------------------------------
To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:
# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
Or visit the following URL, replacing NNNNNN with the revision number:
<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
VII. References
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1418>
The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:18.bsdpatch.asc>
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164
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
=============================================================================
FreeBSD-SA-15:19.routed Security Advisory
The FreeBSD Project
Topic: routed(8) remote denial of service vulnerability
Category: core
Module: routed
Announced: 2015-08-05
Credits: Hiroki Sato
Affects: All supported versions of FreeBSD.
Corrected: 2015-08-05 22:05:02 UTC (stable/10, 10.2-PRERELEASE)
2015-08-05 22:05:02 UTC (stable/10, 10.2-BETA2-p3)
2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC1-p2)
2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC2-p1)
2015-08-05 22:05:18 UTC (releng/10.1, 10.1-RELEASE-p17)
2015-08-05 22:05:07 UTC (stable/9, 9.3-STABLE)
2015-08-05 22:05:24 UTC (releng/9.3, 9.3-RELEASE-p22)
CVE Name: CVE-2015-5674
For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:https://security.FreeBSD.org/>.
I. Background
The routing information protocol (RIP) is an older routing protocol
which, while not as capable as more recent protocols such as OSPF and
BGP, is sometimes preferred for its simplicity and therefore still
used as an interior gateway protocol on smaller networks.
Routers in a RIP network periodically broadcast their routing table on
all enabled interfaces. Neighboring routers and hosts receive these
broadcasts and update their routing tables accordingly.
The routed(8) daemon is a RIP implementation for FreeBSD. The
rtquery(8) utility can be used to send a RIP query to a router and
display the result without updating the routing table.
II. Problem Description
The input path in routed(8) will accept queries from any source and
attempt to answer them. However, the output path assumes that the
destination address for the response is on a directly connected
network.
III. Impact
Upon receipt of a query from a source which is not on a directly
connected network, routed(8) will trigger an assertion and terminate.
The affected system's routing table will no longer be updated. If the
affected system is a router, its routes will eventually expire from
other routers' routing tables, and its networks will no longer be
reachable unless they are also connected to another router.
IV. Workaround
Note that this problem does not affect a system on which routed(8)
is not enabled. The routed(8) daemon is not enabled by default.
Use a packet filter such as pf(4) or ipfw(4) to block incoming UDP
packets with destination port 520 that did not originate on the same
subnet as the destination address.
V. Solution
Perform one of the following:
1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.
The routed service has to be restarted after the update. A reboot is
recommended but not required.
2) To update your vulnerable system via a binary patch:
Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:
# freebsd-update fetch
# freebsd-update install
The routed service has to be restarted after the update. A reboot is
recommended but not required.
3) To update your vulnerable system via a source code patch:
The following patches have been verified to apply to the applicable
FreeBSD release branches.
a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.
# fetch http://security.FreeBSD.org/patches/SA-15:19/routed.patch
# fetch http://security.FreeBSD.org/patches/SA-15:19/routed.patch.asc
# gpg --verify routed.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/routed.patch
c) Recompile routed. Execute the following commands as root:
# cd /usr/src/sbin/routed
# make && make install
Restart the routed daemon, or reboot the system.
To restart the affected service after updating the system, either
reboot the system or execute the following command as root:
# service routed restart
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/9/ r286349
releng/9.3/ r286352
stable/10/ r286348
releng/10.1/ r286351
releng/10.2/ r286350
- -------------------------------------------------------------------------
To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:
# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
Or visit the following URL, replacing NNNNNN with the revision number:
<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
VII. References
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5674>
The latest revision of this advisory is available at
<URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-15:19.routed.asc>
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Index: usr.bin/patch/pathnames.h
===================================================================
--- usr.bin/patch/pathnames.h (revision 286254)
+++ usr.bin/patch/pathnames.h (working copy)
@@ -9,4 +9,4 @@
#include <paths.h>
-#define _PATH_ED "/bin/ed"
+#define _PATH_RED "/bin/red"
Index: usr.bin/patch/pch.c
===================================================================
--- usr.bin/patch/pch.c (revision 286254)
+++ usr.bin/patch/pch.c (working copy)
@@ -1,4 +1,3 @@
-
/*-
* Copyright 1986, Larry Wall
*
@@ -1409,6 +1408,7 @@ do_ed_script(void)
char *t;
off_t beginning_of_this_line;
FILE *pipefp = NULL;
+ int continuation;
if (!skip_rest_of_patch) {
if (copy_file(filearg[0], TMPOUTNAME) < 0) {
@@ -1415,7 +1415,7 @@ do_ed_script(void)
unlink(TMPOUTNAME);
fatal("can't create temp file %s", TMPOUTNAME);
}
- snprintf(buf, buf_size, "%s%s%s", _PATH_ED,
+ snprintf(buf, buf_size, "%s%s%s", _PATH_RED,
verbose ? " " : " -s ", TMPOUTNAME);
pipefp = popen(buf, "w");
}
@@ -1433,7 +1433,19 @@ do_ed_script(void)
(*t == 'a' || *t == 'c' || *t == 'd' || *t == 'i' || *t == 's')) {
if (pipefp != NULL)
fputs(buf, pipefp);
- if (*t != 'd') {
+ if (*t == 's') {
+ for (;;) {
+ continuation = 0;
+ t = strchr(buf, '\0') - 1;
+ while (--t >= buf && *t == '\\')
+ continuation = !continuation;
+ if (!continuation ||
+ pgets(true) == 0)
+ break;
+ if (pipefp != NULL)
+ fputs(buf, pipefp);
+ }
+ } else if (*t != 'd') {
while (pgets(true)) {
p_input_line++;
if (pipefp != NULL)

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@ -0,0 +1,17 @@
Index: sbin/routed/input.c
===================================================================
--- sbin/routed/input.c (revision 286262)
+++ sbin/routed/input.c (working copy)
@@ -160,6 +160,12 @@ input(struct sockaddr_in *from, /* received from
trace_rip("Recv", "from", from, sifp, rip, cc);
+ if (sifp == 0) {
+ trace_pkt(" discard a request from an indirect router"
+ " (possibly an attack)");
+ return;
+ }
+
if (rip->rip_vers == 0) {
msglim(&bad_router, FROM_NADDR,
"RIP version 0, cmd %d, packet received from %s",

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16
share/xml/advisories.xml
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@ -7,6 +7,22 @@
<year> <year>
<name>2015</name> <name>2015</name>
<month>
<name>8</name>
<day>
<name>5</name>
<advisory>
<name>FreeBSD-SA-15:19.routed</name>
</advisory>
<advisory>
<name>FreeBSD-SA-15:18.bsdpatch</name>
</advisory>
</day>
</month>
<month> <month>
<name>7</name> <name>7</name>