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ghostscript: Fix CVE-2025-27834

Browse Source 
Upstream-Status: Backport
[https://cgit.ghostscript.com/cgi-bin/cgit.cgi/ghostpdl.git/commit/?id=ef42ff180a04926e187d40faea40d4a43e304e3b]

(From OE-Core rev: 06fb236cabf550ea7c92cda0a725dd3db8a8a38b)

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Vijay Anusuri 2025-04-08 16:27:19 +05:30 committed by Steve Sakoman
parent bfe8ae1a38
commit ee952ae624
2 changed files with 58 additions and 0 deletions
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57
meta/recipes-extended/ghostscript/ghostscript/CVE-2025-27834.patch Normal file
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@ -0,0 +1,57 @@
From ef42ff180a04926e187d40faea40d4a43e304e3b Mon Sep 17 00:00:00 2001
From: Zdenek Hutyra <zhutyra@centrum.cz>
Date: Mon, 20 Jan 2025 16:13:46 +0000
Subject: [PATCH] PDF interpreter - Guard against unsigned int overflow
Bug #708253 - see bug report for details.
CVE-2025-27834
Upstream-Status: Backport [https://cgit.ghostscript.com/cgi-bin/cgit.cgi/ghostpdl.git/commit/?id=ef42ff180a04926e187d40faea40d4a43e304e3b]
CVE: CVE-2025-27834
Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
pdf/pdf_func.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/pdf/pdf_func.c b/pdf/pdf_func.c
index 9b7d5bb..423e544 100644
--- a/pdf/pdf_func.c
+++ b/pdf/pdf_func.c
@@ -153,6 +153,9 @@ pdfi_parse_type4_func_stream(pdf_context *ctx, pdf_c_stream *function_stream, in
byte *p = (ops ? ops + *size : NULL);
do {
+ if (*size > max_uint / 2)
+ return gs_note_error(gs_error_VMerror);
+
code = pdfi_read_bytes(ctx, &c, 1, 1, function_stream);
if (code < 0)
break;
@@ -318,6 +321,11 @@ pdfi_build_function_4(pdf_context *ctx, gs_function_params_t * mnDR,
if (code < 0)
goto function_4_error;
+ if (size > max_uint - 1) {
+ code = gs_note_error(gs_error_VMerror);
+ goto function_4_error;
+ }
+
ops = gs_alloc_string(ctx->memory, size + 1, "pdfi_build_function_4(ops)");
if (ops == NULL) {
code = gs_error_VMerror;
@@ -816,6 +824,11 @@ int pdfi_build_halftone_function(pdf_context *ctx, gs_function_t ** ppfn, byte *
if (code < 0)
goto halftone_function_error;
+ if (size > max_uint - 1) {
+ code = gs_note_error(gs_error_VMerror);
+ goto halftone_function_error;
+ }
+
ops = gs_alloc_string(ctx->memory, size + 1, "pdfi_build_halftone_function(ops)");
if (ops == NULL) {
code = gs_error_VMerror;
--
2.25.1

1
meta/recipes-extended/ghostscript/ghostscript_9.55.0.bb
View File

@ -66,6 +66,7 @@ SRC_URI_BASE = "https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/d
file://CVE-2025-27831-pre1.patch \
file://CVE-2025-27831.patch \
file://CVE-2025-27832.patch \
file://CVE-2025-27834.patch \
"
SRC_URI = "${SRC_URI_BASE} \