diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/0001-CVE-2018-11806-QEMU-slirp-heap-buffer-overflow.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/0001-CVE-2018-11806-QEMU-slirp-heap-buffer-overflow.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/0001-CVE-2018-11806-QEMU-slirp-heap-buffer-overflow.patch b/meta/recipes-devtools/qemu/qemu/0001-CVE-2018-11806-QEMU-slirp-heap-buffer-overflow.patch new file mode 100644 index 0000000000..8622360114 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/0001-CVE-2018-11806-QEMU-slirp-heap-buffer-overflow.patch @@ -0,0 +1,69 @@ +Upstream-Status: Backport + +https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg01012.html + +From dc21a9d2951f0a2a7e63633e2b5c68c54e4edc4b Mon Sep 17 00:00:00 2001 +From: Jeremy Puhlman <jpuhlman@mvista.com> +Date: Thu, 14 Jun 2018 01:28:49 +0000 +Subject: [PATCH] CVE-2018-11806 QEMU: slirp: heap buffer overflow + +Subject: [Qemu-devel] [PATCH 1/2] slirp: correct size computation while concatenating mbuf +Date: Tue, 5 Jun 2018 23:38:35 +0530 +From: Prasad J Pandit <address@hidden> + +While reassembling incoming fragmented datagrams, 'm_cat' routine +extends the 'mbuf' buffer, if it has insufficient room. It computes +a wrong buffer size, which leads to overwriting adjacent heap buffer +area. Correct this size computation in m_cat. + +Reported-by: ZDI Disclosures <address@hidden> +Signed-off-by: Prasad J Pandit <address@hidden> +--- + slirp/mbuf.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +Signed-off-by: Jeremy Puhlman <jpuhlman@mvista.com> +--- + slirp/mbuf.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/slirp/mbuf.c b/slirp/mbuf.c +index 5ff2455..7fb4501 100644 +--- a/slirp/mbuf.c ++++ b/slirp/mbuf.c +@@ -138,7 +138,7 @@ m_cat(struct mbuf *m, struct mbuf *n) + * If there's no room, realloc + */ + if (M_FREEROOM(m) < n->m_len) +- m_inc(m,m->m_size+MINCSIZE); ++ m_inc(m, m->m_len + n->m_len); + + memcpy(m->m_data+m->m_len, n->m_data, n->m_len); + m->m_len += n->m_len; +@@ -158,12 +158,12 @@ m_inc(struct mbuf *m, int size) + + if (m->m_flags & M_EXT) { + datasize = m->m_data - m->m_ext; +- m->m_ext = g_realloc(m->m_ext, size); ++ m->m_ext = g_realloc(m->m_ext, size + datasize); + m->m_data = m->m_ext + datasize; + } else { + char *dat; + datasize = m->m_data - m->m_dat; +- dat = g_malloc(size); ++ dat = g_malloc(size + datasize); + memcpy(dat, m->m_dat, m->m_size); + + m->m_ext = dat; +@@ -171,7 +171,7 @@ m_inc(struct mbuf *m, int size) + m->m_flags |= M_EXT; + } + +- m->m_size = size; ++ m->m_size = size + datasize; + + } + +-- +2.13.3 + |