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-rw-r--r--gnu/packages/patches/upx-fix-CVE-2017-15056.patch96
1 files changed, 96 insertions, 0 deletions
diff --git a/gnu/packages/patches/upx-fix-CVE-2017-15056.patch b/gnu/packages/patches/upx-fix-CVE-2017-15056.patch
new file mode 100644
index 0000000000..525980e73e
--- /dev/null
+++ b/gnu/packages/patches/upx-fix-CVE-2017-15056.patch
@@ -0,0 +1,96 @@
+From 3e0c2966dffb5dadb512a476ef4be3d0cc51c2be Mon Sep 17 00:00:00 2001
+From: Pierre Neidhardt <ambrevar@gmail.com>
+Date: Sat, 16 Jun 2018 16:35:00 +0200
+Subject: [PATCH] Protect against bad crafted input
+
+Also check for wrap-around when checking oversize involving e_shoff and e_shnum.
+
+raised by https://github.com/upx/upx/pull/190
+ modified: p_lx_elf.cpp
+---
+ src/p_lx_elf.cpp | 30 ++++++++++++++++++++++++++++++
+ 1 file changed, 30 insertions(+)
+
+diff --git a/src/p_lx_elf.cpp b/src/p_lx_elf.cpp
+index 822a7652..41e805ee 100644
+--- a/src/p_lx_elf.cpp
++++ b/src/p_lx_elf.cpp
+@@ -235,8 +235,17 @@ PackLinuxElf32::PackLinuxElf32help1(InputFile *f)
+ sz_phdrs = 0;
+ return;
+ }
++ if (0==e_phnum) throwCantUnpack("0==e_phnum");
+ e_phoff = get_te32(&ehdri.e_phoff);
++ unsigned const last_Phdr = e_phoff + e_phnum * sizeof(Elf32_Phdr);
++ if (last_Phdr < e_phoff || (unsigned long)file_size < last_Phdr) {
++ throwCantUnpack("bad e_phoff");
++ }
+ e_shoff = get_te32(&ehdri.e_shoff);
++ unsigned const last_Shdr = e_shoff + e_shnum * sizeof(Elf32_Shdr);
++ if (last_Shdr < e_shoff || (unsigned long)file_size < last_Shdr) {
++ throwCantUnpack("bad e_shoff");
++ }
+ sz_phdrs = e_phnum * e_phentsize;
+
+ if (f && Elf32_Ehdr::ET_DYN!=e_type) {
+@@ -599,8 +608,17 @@ PackLinuxElf64::PackLinuxElf64help1(InputFile *f)
+ sz_phdrs = 0;
+ return;
+ }
++ if (0==e_phnum) throwCantUnpack("0==e_phnum");
+ e_phoff = get_te64(&ehdri.e_phoff);
++ upx_uint64_t const last_Phdr = e_phoff + e_phnum * sizeof(Elf64_Phdr);
++ if (last_Phdr < e_phoff || (unsigned long)file_size < last_Phdr) {
++ throwCantUnpack("bad e_phoff");
++ }
+ e_shoff = get_te64(&ehdri.e_shoff);
++ upx_uint64_t const last_Shdr = e_shoff + e_shnum * sizeof(Elf64_Shdr);
++ if (last_Shdr < e_shoff || (unsigned long)file_size < last_Shdr) {
++ throwCantUnpack("bad e_shoff");
++ }
+ sz_phdrs = e_phnum * e_phentsize;
+
+ if (f && Elf64_Ehdr::ET_DYN!=e_type) {
+@@ -3763,6 +3781,9 @@ void PackLinuxElf64::pack4(OutputFile *fo, Filter &ft)
+
+ void PackLinuxElf64::unpack(OutputFile *fo)
+ {
++ if (e_phoff != sizeof(Elf64_Ehdr)) {// Phdrs not contiguous with Ehdr
++ throwCantUnpack("bad e_phoff");
++ }
+ unsigned const c_phnum = get_te16(&ehdri.e_phnum);
+ upx_uint64_t old_data_off = 0;
+ upx_uint64_t old_data_len = 0;
+@@ -3828,6 +3849,9 @@ void PackLinuxElf64::unpack(OutputFile *fo)
+ unsigned total_out = 0;
+ unsigned c_adler = upx_adler32(NULL, 0);
+ unsigned u_adler = upx_adler32(NULL, 0);
++ if ((MAX_ELF_HDR - sizeof(Elf64_Ehdr))/sizeof(Elf64_Phdr) < u_phnum) {
++ throwCantUnpack("bad compressed e_phnum");
++ }
+
+ // Packed ET_EXE has no PT_DYNAMIC.
+ // Packed ET_DYN has original PT_DYNAMIC for info needed by rtld.
+@@ -4383,6 +4407,9 @@ Elf64_Sym const *PackLinuxElf64::elf_lookup(char const *name) const
+
+ void PackLinuxElf32::unpack(OutputFile *fo)
+ {
++ if (e_phoff != sizeof(Elf32_Ehdr)) {// Phdrs not contiguous with Ehdr
++ throwCantUnpack("bad e_phoff");
++ }
+ unsigned const c_phnum = get_te16(&ehdri.e_phnum);
+ unsigned old_data_off = 0;
+ unsigned old_data_len = 0;
+@@ -4449,6 +4476,9 @@ void PackLinuxElf32::unpack(OutputFile *fo)
+ unsigned total_out = 0;
+ unsigned c_adler = upx_adler32(NULL, 0);
+ unsigned u_adler = upx_adler32(NULL, 0);
++ if ((MAX_ELF_HDR - sizeof(Elf32_Ehdr))/sizeof(Elf32_Phdr) < u_phnum) {
++ throwCantUnpack("bad compressed e_phnum");
++ }
+
+ // Packed ET_EXE has no PT_DYNAMIC.
+ // Packed ET_DYN has original PT_DYNAMIC for info needed by rtld.
+--
+2.17.0
+