Headline
CVE-2022-1441: fixed #2175 · gpac/gpac@3dbe11b
MP4Box is a component of GPAC-2.0.0, which is a widely-used third-party package on RPM Fusion. When MP4Box tries to parse a MP4 file, it calls the function diST_box_read() to read from video. In this function, it allocates a buffer str with fixed length. However, content read from bs is controllable by user, so is the length, which causes a buffer overflow.
@@ -1128,20 +1128,12 @@ void diST_box_del(GF_Box *s)
GF_Err diST_box_read(GF_Box *s, GF_BitStream *bs)
{
u32 i;
char str[1024];
GF_DIMSScriptTypesBox *p = (GF_DIMSScriptTypesBox *)s;
i=0;
str[0]=0;
while (1) {
str[i] = gf_bs_read_u8(bs);
if (!str[i]) break;
i++;
}
ISOM_DECREASE_SIZE(p, i);
p->content_script_types = gf_strdup(str);
p->content_script_types = gf_malloc(sizeof(char) * (s->size+1));
if (!p->content_script_types) return GF_OUT_OF_MEM;
gf_bs_read_data(bs, p->content_script_types, s->size);
p->content_script_types[s->size] = 0;
return GF_OK;
}
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