diff options
Diffstat (limited to 'meta-oe/recipes-devtools/yajl/yajl/CVE-2022-24795.patch')
-rw-r--r-- | meta-oe/recipes-devtools/yajl/yajl/CVE-2022-24795.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/meta-oe/recipes-devtools/yajl/yajl/CVE-2022-24795.patch b/meta-oe/recipes-devtools/yajl/yajl/CVE-2022-24795.patch new file mode 100644 index 0000000000..0dc859099d --- /dev/null +++ b/meta-oe/recipes-devtools/yajl/yajl/CVE-2022-24795.patch @@ -0,0 +1,59 @@ +From 17de4d15687aa30c49660dc4b792b1fb4d38b569 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com> +Date: Thu, 7 Apr 2022 17:29:54 +0200 +Subject: [PATCH] Fix CVE-2022-24795 + +There was an integer overflow in yajl_buf_ensure_available() leading +to allocating less memory than requested. Then data were written past +the allocated heap buffer in yajl_buf_append(), the only caller of +yajl_buf_ensure_available(). Another result of the overflow was an +infinite loop without a return from yajl_buf_ensure_available(). + +yajl-ruby project, which bundles yajl, fixed it +<https://github.com/brianmario/yajl-ruby/pull/211> by checking for the +integer overflow, fortifying buffer allocations, and report the +failures to a caller. But then the caller yajl_buf_append() skips +a memory write if yajl_buf_ensure_available() failed leading to a data +corruption. + +A yajl fork mainter recommended calling memory allocation callbacks with +the large memory request and let them to handle it. But that has the +problem that it's not possible pass the overely large size to the +callbacks. + +This patch catches the integer overflow and terminates the process +with abort(). + +CVE: CVE-2022-24795 +Upstream-Status: Submitted [https://github.com/lloyd/yajl/issues/239] +Signed-off-by: Ross Burton <ross.burton@arm.com> +--- + src/yajl_buf.c | 12 +++++++++++- + 1 file changed, 11 insertions(+), 1 deletion(-) + +diff --git a/src/yajl_buf.c b/src/yajl_buf.c +index 1aeafde..55c11ad 100644 +--- a/src/yajl_buf.c ++++ b/src/yajl_buf.c +@@ -45,7 +45,17 @@ void yajl_buf_ensure_available(yajl_buf buf, size_t want) + + need = buf->len; + +- while (want >= (need - buf->used)) need <<= 1; ++ if (((buf->used > want) ? buf->used : want) > (size_t)(buf->used + want)) { ++ /* We cannot allocate more memory than SIZE_MAX. */ ++ abort(); ++ } ++ while (want >= (need - buf->used)) { ++ if (need >= (size_t)((size_t)(-1)<<1)>>1) { ++ /* need would overflow. */ ++ abort(); ++ } ++ need <<= 1; ++ } + + if (need != buf->len) { + buf->data = (unsigned char *) YA_REALLOC(buf->alloc, buf->data, need); +-- +2.34.1 + |