From bbfee34f4188ac00371abe1389ae9c9fb989a0cd Mon Sep 17 00:00:00 2001 From: Doug Flick Date: Fri, 26 Jan 2024 05:54:48 +0800 Subject: NetworkPkg: Ip6Dxe: SECURITY PATCH CVE-2023-45231 Patch REF:https://bugzilla.tianocore.org/show_bug.cgi?id=4536 Bug Overview: PixieFail Bug #3 CVE-2023-45231 CVSS 6.5 : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CWE-125 Out-of-bounds Read Out-of-bounds read when handling a ND Redirect message with truncated options Change Overview: Adds a check to prevent truncated options from being parsed + // + // Cannot process truncated options. + // Cannot process options with a length of 0 as there is no Type field. + // + if (OptionLen < sizeof (IP6_OPTION_HEADER)) { + return FALSE; + } Cc: Saloni Kasbekar Cc: Zachary Clark-williams Signed-off-by: Doug Flick [MSFT] Reviewed-by: Saloni Kasbekar --- NetworkPkg/Ip6Dxe/Ip6Option.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'NetworkPkg') diff --git a/NetworkPkg/Ip6Dxe/Ip6Option.c b/NetworkPkg/Ip6Dxe/Ip6Option.c index 199eea124d..8718d5d875 100644 --- a/NetworkPkg/Ip6Dxe/Ip6Option.c +++ b/NetworkPkg/Ip6Dxe/Ip6Option.c @@ -137,6 +137,14 @@ Ip6IsNDOptionValid ( return FALSE; } + // + // Cannot process truncated options. + // Cannot process options with a length of 0 as there is no Type field. + // + if (OptionLen < sizeof (IP6_OPTION_HEADER)) { + return FALSE; + } + Offset = 0; // -- cgit v1.2.3