From 1dae37b163e1e08e719ac06fa86b3414b4ddfb2b Mon Sep 17 00:00:00 2001 From: CoprDistGit Date: Mon, 30 Oct 2023 11:56:48 +0000 Subject: automatic import of edk2 --- ...kg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch | 97 ++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 0008-NetworkPkg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch (limited to '0008-NetworkPkg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch') diff --git a/0008-NetworkPkg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch b/0008-NetworkPkg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch new file mode 100644 index 0000000..0996638 --- /dev/null +++ b/0008-NetworkPkg-IScsiDxe-fix-IScsiHexToBin-hex-parsing.patch @@ -0,0 +1,97 @@ +From 47b76780b487dbfde4efb6843b16064c4a97e94d Mon Sep 17 00:00:00 2001 +From: Laszlo Ersek +Date: Tue, 8 Jun 2021 14:12:57 +0200 +Subject: [PATCH 25/27] NetworkPkg/IScsiDxe: fix IScsiHexToBin() hex parsing +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The IScsiHexToBin() function has the following parser issues: + +(1) If the *subject sequence* in "HexStr" is empty, the function returns + EFI_SUCCESS (with "BinLength" set to 0 on output). Such inputs should + be rejected. + +(2) The function mis-handles a "HexStr" that ends with a stray nibble. For + example, if "HexStr" is "0xABC", the function decodes it to the bytes + {0xAB, 0x0C}, sets "BinLength" to 2 on output, and returns + EFI_SUCCESS. Such inputs should be rejected. + +(3) If an invalid hex char is found in "HexStr", the function treats it as + end-of-hex-string, and returns EFI_SUCCESS. Such inputs should be + rejected. + +All of the above cases are remotely triggerable, as shown in a subsequent +patch, which adds error checking to the IScsiHexToBin() call sites. While +the initiator is not immediately compromised, incorrectly parsing CHAP_R +from the target, in case of mutual authentication, is not great. + +Extend the interface contract of IScsiHexToBin() with +EFI_INVALID_PARAMETER, for reporting issues (1) through (3), and implement +the new checks. + +Cc: Jiaxin Wu +Cc: Maciej Rabeda +Cc: Philippe Mathieu-Daudé +Cc: Siyuan Fu +Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356 +Signed-off-by: Laszlo Ersek +Reviewed-by: Maciej Rabeda +Reviewed-by: Philippe Mathieu-Daudé +Message-Id: <20210608121259.32451-9-lersek@redhat.com> +--- + NetworkPkg/IScsiDxe/IScsiMisc.c | 12 ++++++++++-- + NetworkPkg/IScsiDxe/IScsiMisc.h | 1 + + 2 files changed, 11 insertions(+), 2 deletions(-) + +diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c +index 014700e87a..f0f4992b07 100644 +--- a/NetworkPkg/IScsiDxe/IScsiMisc.c ++++ b/NetworkPkg/IScsiDxe/IScsiMisc.c +@@ -376,6 +376,7 @@ IScsiBinToHex ( + + @retval EFI_SUCCESS The hexadecimal string is converted into a + binary encoded buffer. ++ @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. + @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the + converted data. + **/ +@@ -402,14 +403,21 @@ IScsiHexToBin ( + + Length = AsciiStrLen (HexStr); + ++ // ++ // Reject an empty hex string; reject a stray nibble. ++ // ++ if (Length == 0 || Length % 2 != 0) { ++ return EFI_INVALID_PARAMETER; ++ } ++ + for (Index = 0; Index < Length; Index ++) { + TemStr[0] = HexStr[Index]; + Digit = (UINT8) AsciiStrHexToUint64 (TemStr); + if (Digit == 0 && TemStr[0] != '0') { + // +- // Invalid Lun Char. ++ // Invalid Hex Char. + // +- break; ++ return EFI_INVALID_PARAMETER; + } + if ((Index & 1) == 0) { + BinBuffer [Index/2] = Digit; +diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.h b/NetworkPkg/IScsiDxe/IScsiMisc.h +index 28cf408cd5..404a482e57 100644 +--- a/NetworkPkg/IScsiDxe/IScsiMisc.h ++++ b/NetworkPkg/IScsiDxe/IScsiMisc.h +@@ -171,6 +171,7 @@ IScsiBinToHex ( + + @retval EFI_SUCCESS The hexadecimal string is converted into a + binary encoded buffer. ++ @retval EFI_INVALID_PARAMETER Invalid hex encoding found in HexStr. + @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the + converted data. + **/ +-- +2.27.0 + -- cgit v1.2.3