poppler: fix CVE-2025-43903kirkstone-nextkirkstone

NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not
verify the adbe.pkcs7.sha1 signatures on documents, resulting
in potential signature forgeries.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-43903

Upstream patch:
https://gitlab.freedesktop.org/poppler/poppler/-/commit/f1b9c830f145a0042e853d6462b2f9ca4016c669

Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 55 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/poppler/poppler/CVE-2025-43903.patch b/meta-oe/recipes-support/poppler/poppler/CVE-2025-43903.patch
new file mode 100644
index 0000000000..e5acf7492b
--- /dev/null
+++ b/meta-oe/recipes-support/poppler/poppler/CVE-2025-43903.patch
@@ -0,0 +1,54 @@
+From f1b9c830f145a0042e853d6462b2f9ca4016c669 Mon Sep 17 00:00:00 2001
+From: Juraj sarinay <juraj@sarinay.com>
+Date: Thu, 6 Mar 2025 02:02:56 +0100
+Subject: [PATCH] Properly verify adbe.pkcs7.sha1 signatures.
+
+For signatures with non-empty encapsulated content
+(typically adbe.pkcs7.sha1), we only compared hash values and
+never actually checked SignatureValue within SignerInfo.
+The bug introduced by c7c0207b
+made trivial signature forgeries possible. Fix this by calling
+NSS_CMSSignerInfo_Verify() after the hash values compare equal.
+
+CVE: CVE-2025-43903
+Upstream-Status: Backport [https://gitlab.freedesktop.org/poppler/poppler/-/commit/f1b9c830f145a0042e853d6462b2f9ca4016c669]
+
+Changes:
+- Refresh patch context as per the source code.
+
+Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
+---
+ poppler/SignatureHandler.cc | 13 ++++++++-----
+ 1 file changed, 8 insertions(+), 5 deletions(-)
+
+diff --git a/poppler/SignatureHandler.cc b/poppler/SignatureHandler.cc
+index 6538239..4008b2c 100644
+--- a/poppler/SignatureHandler.cc
++++ b/poppler/SignatureHandler.cc
+@@ -969,16 +969,19 @@ SignatureValidationStatus SignatureHandler::validateSignature()
+           This means it's not a detached type signature
+           so the digest is contained in SignedData->contentInfo
+         */
+-        if (memcmp(digest.data, content_info_data->data, hash_length) == 0 && digest.len == content_info_data->len) {
+-            PORT_Free(digest_buffer);
+-            return SIGNATURE_VALID;
+-        } else {
++        if (digest.len != content_info_data->len || memcmp(digest.data, content_info_data->data, digest.len) != 0) {
+             PORT_Free(digest_buffer);
+             return SIGNATURE_DIGEST_MISMATCH;
+         }
+
+-    } else if (NSS_CMSSignerInfo_Verify(CMSSignerInfo, &digest, nullptr) != SECSuccess) {
++        auto innerHashContext = HASH_Create(getHashAlgorithm());
++        HASH_Update(innerHashContext, content_info_data->data, content_info_data->len);
++        HASH_End(innerHashContext, digest_buffer, &result_len, hash_length);
++        digest.data = digest_buffer;
++        digest.len = hash_length;
++    }
+
++    if (NSS_CMSSignerInfo_Verify(CMSSignerInfo, &digest, nullptr) != SECSuccess) {
+         PORT_Free(digest_buffer);
+         return NSS_SigTranslate(CMSSignerInfo->verificationStatus);
+     } else {
+--
+2.40.0
diff --git a/meta-oe/recipes-support/poppler/poppler_22.04.0.bb b/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
index 494308b8a5..bb6e64d657 100644
--- a/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
+++ b/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
@@ -13,6 +13,7 @@ SRC_URI = "http://poppler.freedesktop.org/${BP}.tar.xz \
            file://CVE-2024-56378.patch \
            file://CVE-2025-32364.patch \
            file://CVE-2025-32365.patch \
+           file://CVE-2025-43903.patch \
            "
 SRC_URI[sha256sum] = "813fb4b90e7bda63df53205c548602bae728887a60f4048aae4dbd9b1927deff"