diff options
Diffstat (limited to 'meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch')
| -rw-r--r-- | meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch | 47 |
1 files changed, 47 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 0000000000..b7ba7ba643 --- /dev/null +++ b/meta/recipes-connectivity/ppp/ppp/0001-pppd-Fix-bounds-check-in-EAP-code.patch @@ -0,0 +1,47 @@ +From 8d7970b8f3db727fe798b65f3377fe6787575426 Mon Sep 17 00:00:00 2001 +From: Paul Mackerras <paulus@ozlabs.org> +Date: Mon, 3 Feb 2020 15:53:28 +1100 +Subject: [PATCH] pppd: Fix bounds check in EAP code + +Given that we have just checked vallen < len, it can never be the case +that vallen >= len + sizeof(rhostname). This fixes the check so we +actually avoid overflowing the rhostname array. + +Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> +Signed-off-by: Paul Mackerras <paulus@ozlabs.org> + +Upstream-Status: Backport +[https://github.com/paulusmack/ppp/commit/8d7970b8f3db727fe798b65f3377fe6787575426] + +CVE: CVE-2020-8597 + +Signed-off-by: Yi Zhao <yi.zhao@windriver.com> +--- + pppd/eap.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/pppd/eap.c b/pppd/eap.c +index 94407f5..1b93db0 100644 +--- a/pppd/eap.c ++++ b/pppd/eap.c +@@ -1420,7 +1420,7 @@ int len; + } + + /* Not so likely to happen. */ +- if (vallen >= len + sizeof (rhostname)) { ++ if (len - vallen >= sizeof (rhostname)) { + dbglog("EAP: trimming really long peer name down"); + BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1); + rhostname[sizeof (rhostname) - 1] = '\0'; +@@ -1846,7 +1846,7 @@ int len; + } + + /* Not so likely to happen. */ +- if (vallen >= len + sizeof (rhostname)) { ++ if (len - vallen >= sizeof (rhostname)) { + dbglog("EAP: trimming really long peer name down"); + BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1); + rhostname[sizeof (rhostname) - 1] = '\0'; +-- +2.17.1 + |