elfutils: Fix CVE-2025-1371

A vulnerability has been found in GNU elfutils 0.192 and classified as problematic.
This vulnerability affects the function handle_dynamic_symtab of the file readelf.c
of the component eu-read. The manipulation leads to null pointer dereference.
Attacking locally is a requirement. The exploit has been disclosed to the public and
may be used. The patch is identified as b38e562a4c907e08171c76b8b2def8464d5a104a. It
is recommended to apply a patch to fix this issue.

References:
https://nvd.nist.gov/vuln/detail/CVE-2025-1371
https://ubuntu.com/security/CVE-2025-1371

Upstream patch:
https://sourceware.org/cgit/elfutils/commit/?id=b38e562a4c907e08171c76b8b2def8464d5a104a

(From OE-Core rev: 11c44bde4f3d9e63506ece2f9b27114914aacc4b)

Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 42 insertions, 0 deletions

diff --git a/meta/recipes-devtools/elfutils/elfutils_0.191.bb b/meta/recipes-devtools/elfutils/elfutils_0.191.bb
index 85e024179b..bab3d94d12 100644
--- a/meta/recipes-devtools/elfutils/elfutils_0.191.bb
+++ b/meta/recipes-devtools/elfutils/elfutils_0.191.bb
@@ -26,6 +26,7 @@ SRC_URI = "https://sourceware.org/elfutils/ftp/${PV}/${BP}.tar.bz2 \
            file://CVE-2025-1352.patch \
            file://CVE-2025-1365.patch \
            file://CVE-2025-1372.patch \
+           file://CVE-2025-1371.patch \
            "
 SRC_URI:append:libc-musl = " \
            file://0003-musl-utils.patch \
diff --git a/meta/recipes-devtools/elfutils/files/CVE-2025-1371.patch b/meta/recipes-devtools/elfutils/files/CVE-2025-1371.patch
new file mode 100644
index 0000000000..ebb57bd4e5
--- /dev/null
+++ b/meta/recipes-devtools/elfutils/files/CVE-2025-1371.patch
@@ -0,0 +1,41 @@
+From b38e562a4c907e08171c76b8b2def8464d5a104a Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mark@klomp.org>
+Date: Sun, 9 Feb 2025 00:07:13 +0100
+Subject: [PATCH] readelf: Handle NULL phdr in handle_dynamic_symtab
+
+A corrupt ELF file can have broken program headers, in which case
+gelf_getphdr returns NULL. This could crash handle_dynamic_symtab
+while searching for the PT_DYNAMIC phdr. Fix this by checking whether
+gelf_phdr returns NULL.
+
+          * src/readelf.c (handle_dynamic_symtab): Check whether
+          gelf_getphdr returns NULL.
+
+https://sourceware.org/bugzilla/show_bug.cgi?id=32655
+
+Signed-off-by: Mark Wielaard <mark@klomp.org>
+
+CVE: CVE-2025-1371
+
+Upstream-Status: Backport [https://sourceware.org/cgit/elfutils/commit/?id=b38e562a4c907e08171c76b8b2def8464d5a104a]
+
+Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
+---
+ src/readelf.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/readelf.c b/src/readelf.c
+index fc04556..13344bf 100644
+--- a/src/readelf.c
++++ b/src/readelf.c
+@@ -2912,7 +2912,7 @@ handle_dynamic_symtab (Ebl *ebl)
+   for (size_t i = 0; i < phnum; ++i)
+     {
+       phdr = gelf_getphdr (ebl->elf, i, &phdr_mem);
+-      if (phdr->p_type == PT_DYNAMIC)
++      if (phdr == NULL || phdr->p_type == PT_DYNAMIC)
+        break;
+     }
+   if (phdr == NULL)
+--
+2.40.0