diff --git a/SOURCES/0001-xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch b/SOURCES/0001-xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch new file mode 100644 index 0000000..6e5ebb5 --- /dev/null +++ b/SOURCES/0001-xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch @@ -0,0 +1,59 @@ +From 18f91b950e22c2a342a4fbc55e9ddf7534a707d2 Mon Sep 17 00:00:00 2001 +From: Peter Hutterer +Date: Wed, 13 Jul 2022 11:23:09 +1000 +Subject: [PATCH xserver] xkb: fix some possible memleaks in XkbGetKbdByName + +GetComponentByName returns an allocated string, so let's free that if we +fail somewhere. + +Signed-off-by: Peter Hutterer +--- + xkb/xkb.c | 26 ++++++++++++++++++++------ + 1 file changed, 20 insertions(+), 6 deletions(-) + +diff --git a/xkb/xkb.c b/xkb/xkb.c +index 4692895db..b79a269e3 100644 +--- a/xkb/xkb.c ++++ b/xkb/xkb.c +@@ -5935,18 +5935,32 @@ ProcXkbGetKbdByName(ClientPtr client) + xkb = dev->key->xkbInfo->desc; + status = Success; + str = (unsigned char *) &stuff[1]; +- if (GetComponentSpec(&str, TRUE, &status)) /* keymap, unsupported */ +- return BadMatch; ++ { ++ char *keymap = GetComponentSpec(&str, TRUE, &status); /* keymap, unsupported */ ++ if (keymap) { ++ free(keymap); ++ return BadMatch; ++ } ++ } + names.keycodes = GetComponentSpec(&str, TRUE, &status); + names.types = GetComponentSpec(&str, TRUE, &status); + names.compat = GetComponentSpec(&str, TRUE, &status); + names.symbols = GetComponentSpec(&str, TRUE, &status); + names.geometry = GetComponentSpec(&str, TRUE, &status); +- if (status != Success) ++ if (status == Success) { ++ len = str - ((unsigned char *) stuff); ++ if ((XkbPaddedSize(len) / 4) != stuff->length) ++ status = BadLength; ++ } ++ ++ if (status != Success) { ++ free(names.keycodes); ++ free(names.types); ++ free(names.compat); ++ free(names.symbols); ++ free(names.geometry); + return status; +- len = str - ((unsigned char *) stuff); +- if ((XkbPaddedSize(len) / 4) != stuff->length) +- return BadLength; ++ } + + CHK_MASK_LEGAL(0x01, stuff->want, XkbGBN_AllComponentsMask); + CHK_MASK_LEGAL(0x02, stuff->need, XkbGBN_AllComponentsMask); +-- +2.38.1 + diff --git a/SOURCES/0001-xkb-proof-GetCountedString-against-request-length-at.patch b/SOURCES/0001-xkb-proof-GetCountedString-against-request-length-at.patch new file mode 100644 index 0000000..d358a32 --- /dev/null +++ b/SOURCES/0001-xkb-proof-GetCountedString-against-request-length-at.patch @@ -0,0 +1,35 @@ +From 11beef0b7f1ed290348e45618e5fa0d2bffcb72e Mon Sep 17 00:00:00 2001 +From: Peter Hutterer +Date: Tue, 5 Jul 2022 12:06:20 +1000 +Subject: [PATCH xserver] xkb: proof GetCountedString against request length + attacks + +GetCountedString did a check for the whole string to be within the +request buffer but not for the initial 2 bytes that contain the length +field. A swapped client could send a malformed request to trigger a +swaps() on those bytes, writing into random memory. + +Signed-off-by: Peter Hutterer +--- + xkb/xkb.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/xkb/xkb.c b/xkb/xkb.c +index f42f59ef3..1841cff26 100644 +--- a/xkb/xkb.c ++++ b/xkb/xkb.c +@@ -5137,6 +5137,11 @@ _GetCountedString(char **wire_inout, ClientPtr client, char **str) + CARD16 len; + + wire = *wire_inout; ++ ++ if (client->req_len < ++ bytes_to_int32(wire + 2 - (char *) client->requestBuffer)) ++ return BadValue; ++ + len = *(CARD16 *) wire; + if (client->swapped) { + swaps(&len); +-- +2.38.1 + diff --git a/SPECS/xorg-x11-server-Xwayland.spec b/SPECS/xorg-x11-server-Xwayland.spec index aed5dc2..7eec553 100644 --- a/SPECS/xorg-x11-server-Xwayland.spec +++ b/SPECS/xorg-x11-server-Xwayland.spec @@ -9,7 +9,7 @@ Summary: Xwayland Name: xorg-x11-server-Xwayland Version: 21.1.3 -Release: 6%{?gitdate:.%{gitdate}git%{shortcommit}}%{?dist} +Release: 7%{?gitdate:.%{gitdate}git%{shortcommit}}%{?dist} URL: http://www.x.org %if 0%{?gitdate} @@ -35,6 +35,10 @@ Patch10004: 0004-render-Fix-out-of-bounds-access-in-SProcRenderCompos.patch Patch10005: 0001-xkb-switch-to-array-index-loops-to-moving-pointers.patch Patch10006: 0002-xkb-swap-XkbSetDeviceInfo-and-XkbSetDeviceInfoCheck.patch Patch10007: 0003-xkb-add-request-length-validation-for-XkbSetGeometry.patch +# CVE-2022-3550 +Patch10008: 0001-xkb-proof-GetCountedString-against-request-length-at.patch +# CVE-2022-3551 +Patch10009: 0001-xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch License: MIT @@ -142,6 +146,10 @@ rm -Rf $RPM_BUILD_ROOT%{_localstatedir}/lib/xkb %{_libdir}/pkgconfig/xwayland.pc %changelog +* Mon Nov 14 2022 Olivier Fourdan - 21.1.3-7 +- Fix CVE-2022-3550, CVE-2022-3551 + Resolves: rhbz#2140767, rhbz#2140774 + * Fri Jul 29 2022 Olivier Fourdan - 21.1.3-6 - CVE fix for: CVE-2022-2319/ZDI-CAN-16062, CVE-2022-2320/ZDI-CAN-16070 Resolves: rhbz#2110442, rhbz#2110437