summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorYi Zhao <yi.zhao@windriver.com>2020-02-21 21:58:40 (GMT)
committerRichard Purdie <richard.purdie@linuxfoundation.org>2020-04-08 23:07:12 (GMT)
commit37a64657e60bda8e949694469518c1b0111e364a (patch)
tree30e01afea48337dd64f494665c32e92363f6490d
parentb0cb5deb8648f14b5a25771029a3a6d0d39a1a2e (diff)
downloadpoky-37a64657e60bda8e949694469518c1b0111e364a.tar.gz
ppp: Security fix CVE-2020-8597
CVE-2020-8597: eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions. References: https://nvd.nist.gov/vuln/detail/CVE-2020-8597 Patch from: https://github.com/paulusmack/ppp/commit/8d7970b8f3db727fe798b65f3377fe6787575426 (From OE-Core rev: 4ea1d88702d422d4eff5c78698a123563bda4138) Signed-off-by: Yi Zhao <yi.zhao@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch47
-rw-r--r--meta/recipes-connectivity/ppp/ppp_2.4.7.bb1
2 files changed, 48 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch b/meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch
new file mode 100644
index 0000000..b7ba7ba
--- /dev/null
+++ b/meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch
@@ -0,0 +1,47 @@
1From 8d7970b8f3db727fe798b65f3377fe6787575426 Mon Sep 17 00:00:00 2001
2From: Paul Mackerras <paulus@ozlabs.org>
3Date: Mon, 3 Feb 2020 15:53:28 +1100
4Subject: [PATCH] pppd: Fix bounds check in EAP code
5
6Given that we have just checked vallen < len, it can never be the case
7that vallen >= len + sizeof(rhostname). This fixes the check so we
8actually avoid overflowing the rhostname array.
9
10Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
11Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
12
13Upstream-Status: Backport
14[https://github.com/paulusmack/ppp/commit/8d7970b8f3db727fe798b65f3377fe6787575426]
15
16CVE: CVE-2020-8597
17
18Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
19---
20 pppd/eap.c | 4 ++--
21 1 file changed, 2 insertions(+), 2 deletions(-)
22
23diff --git a/pppd/eap.c b/pppd/eap.c
24index 94407f5..1b93db0 100644
25--- a/pppd/eap.c
26+++ b/pppd/eap.c
27@@ -1420,7 +1420,7 @@ int len;
28 }
29
30 /* Not so likely to happen. */
31- if (vallen >= len + sizeof (rhostname)) {
32+ if (len - vallen >= sizeof (rhostname)) {
33 dbglog("EAP: trimming really long peer name down");
34 BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1);
35 rhostname[sizeof (rhostname) - 1] = '\0';
36@@ -1846,7 +1846,7 @@ int len;
37 }
38
39 /* Not so likely to happen. */
40- if (vallen >= len + sizeof (rhostname)) {
41+ if (len - vallen >= sizeof (rhostname)) {
42 dbglog("EAP: trimming really long peer name down");
43 BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1);
44 rhostname[sizeof (rhostname) - 1] = '\0';
45--
462.17.1
47
diff --git a/meta/recipes-connectivity/ppp/ppp_2.4.7.bb b/meta/recipes-connectivity/ppp/ppp_2.4.7.bb
index 644cde4..60c56dd 100644
--- a/meta/recipes-connectivity/ppp/ppp_2.4.7.bb
+++ b/meta/recipes-connectivity/ppp/ppp_2.4.7.bb
@@ -33,6 +33,7 @@ SRC_URI = "https://download.samba.org/pub/${BPN}/${BP}.tar.gz \
33 file://0001-pppoe-include-netinet-in.h-before-linux-in.h.patch \ 33 file://0001-pppoe-include-netinet-in.h-before-linux-in.h.patch \
34 file://0001-ppp-Remove-unneeded-include.patch \ 34 file://0001-ppp-Remove-unneeded-include.patch \
35 file://ppp-2.4.7-DES-openssl.patch \ 35 file://ppp-2.4.7-DES-openssl.patch \
36 file://0001-pppd-Fix-bounds-check-in-EAP-code.patch \
36" 37"
37 38
38SRC_URI_append_libc-musl = "\ 39SRC_URI_append_libc-musl = "\