diff options
Diffstat (limited to '0004-upd6-check-udp6_input-buffer-size.patch')
| -rw-r--r-- | 0004-upd6-check-udp6_input-buffer-size.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/0004-upd6-check-udp6_input-buffer-size.patch b/0004-upd6-check-udp6_input-buffer-size.patch new file mode 100644 index 0000000..a832f6b --- /dev/null +++ b/0004-upd6-check-udp6_input-buffer-size.patch @@ -0,0 +1,36 @@ +From 30feadb676a0792036a0f64309235c5767e2ee76 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com> +Date: Fri, 4 Jun 2021 16:32:55 +0400 +Subject: [PATCH 4/7] upd6: check udp6_input buffer size +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Fixes: CVE-2021-3593 +Fixes: https://gitlab.freedesktop.org/slirp/libslirp/-/issues/45 + +Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> +(cherry picked from commit de71c15de66ba9350bf62c45b05f8fbff166517b) +--- + src/udp6.c | 5 ++++- + 1 file changed, 4 insertions(+), 1 deletion(-) + +diff --git a/src/udp6.c b/src/udp6.c +index fdd8089..236b962 100644 +--- a/src/udp6.c ++++ b/src/udp6.c +@@ -29,7 +29,10 @@ void udp6_input(struct mbuf *m) + ip = mtod(m, struct ip6 *); + m->m_len -= iphlen; + m->m_data += iphlen; +- uh = mtod(m, struct udphdr *); ++ uh = mtod_check(m, sizeof(struct udphdr)); ++ if (uh == NULL) { ++ goto bad; ++ } + m->m_len += iphlen; + m->m_data -= iphlen; + +-- +2.29.0 + |