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fix: buffer overflow in multipart body proc #3546

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Merged
airween merged 5 commits into from
Apr 21, 2026
+59 −3
Merged

fix: buffer overflow in multipart body proc #3546

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164de0f
fix: buffer overflow in multipart body proc
airween Apr 12, 2026
b9fb213
cast argument as unsigned
airween Apr 12, 2026
f9248f9
Check if filename arg is quoted and it has the trailing quote
airween Apr 13, 2026
9b33b2e
Change conditions' order; cast isdigit()'s argument
airween Apr 19, 2026
3b8b094
Merge branch 'v3/master' into v3/multipartbofix
airween Apr 19, 2026
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6 changes: 4 additions & 2 deletions src/request_body_processor/multipart.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -362,7 +362,7 @@ int Multipart::parse_content_disposition(const char *c_d_value, int offset) {
const char* start_of_filename = p;
while ((*p != '\0') && (*p != ';')) {
if (*p == '%') {
if ((*(p+1) == '\0') || (!isxdigit(*(p+1))) || (!isxdigit(*(p+2)))) {
if ((*(p+1) == '\0') || (!isxdigit(*(p+1))) || (*(p+2) == '\0') || (!isxdigit(*(p+2)))) {
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return -18;
}
p += 3;
Expand Down Expand Up @@ -415,7 +415,9 @@ int Multipart::parse_content_disposition(const char *c_d_value, int offset) {
value.append((p++), 1);
}

p++; /* go over the quote at the end */
if (*p == quote) {
p++; /* go over the quote at the end */
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}

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} else {
/* not quoted */
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