diff options
Diffstat (limited to '0001-CVE-2023-43785-out-of-bounds-memory-access-in-_XkbRe.patch')
| -rw-r--r-- | 0001-CVE-2023-43785-out-of-bounds-memory-access-in-_XkbRe.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/0001-CVE-2023-43785-out-of-bounds-memory-access-in-_XkbRe.patch b/0001-CVE-2023-43785-out-of-bounds-memory-access-in-_XkbRe.patch new file mode 100644 index 0000000..6427fc2 --- /dev/null +++ b/0001-CVE-2023-43785-out-of-bounds-memory-access-in-_XkbRe.patch @@ -0,0 +1,58 @@ +From 6858d468d9ca55fb4c5fd70b223dbc78a3358a7f Mon Sep 17 00:00:00 2001 +From: Alan Coopersmith <alan.coopersmith@oracle.com> +Date: Sun, 17 Sep 2023 14:19:40 -0700 +Subject: [PATCH] CVE-2023-43785: out-of-bounds memory access in + _XkbReadKeySyms() + +Make sure we allocate enough memory in the first place, and +also handle error returns from _XkbReadBufferCopyKeySyms() when +it detects out-of-bounds issues. + +Reported-by: Gregory James DUCK <gjduck@gmail.com> +Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> +--- + src/xkb/XKBGetMap.c | 14 +++++++++----- + 1 file changed, 9 insertions(+), 5 deletions(-) + +diff --git a/src/xkb/XKBGetMap.c b/src/xkb/XKBGetMap.c +index 2891d21e..31199e4a 100644 +--- a/src/xkb/XKBGetMap.c ++++ b/src/xkb/XKBGetMap.c +@@ -182,7 +182,8 @@ _XkbReadKeySyms(XkbReadBufferPtr buf, XkbDescPtr xkb, xkbGetMapReply *rep) + if (offset + newMap->nSyms >= map->size_syms) { + register int sz; + +- sz = map->size_syms + 128; ++ sz = offset + newMap->nSyms; ++ sz = ((sz + (unsigned) 128) / 128) * 128; + _XkbResizeArray(map->syms, map->size_syms, sz, KeySym); + if (map->syms == NULL) { + map->size_syms = 0; +@@ -191,8 +192,9 @@ _XkbReadKeySyms(XkbReadBufferPtr buf, XkbDescPtr xkb, xkbGetMapReply *rep) + map->size_syms = sz; + } + if (newMap->nSyms > 0) { +- _XkbReadBufferCopyKeySyms(buf, (KeySym *) &map->syms[offset], +- newMap->nSyms); ++ if (_XkbReadBufferCopyKeySyms(buf, (KeySym *) &map->syms[offset], ++ newMap->nSyms) == 0) ++ return BadLength; + offset += newMap->nSyms; + } + else { +@@ -222,8 +224,10 @@ _XkbReadKeySyms(XkbReadBufferPtr buf, XkbDescPtr xkb, xkbGetMapReply *rep) + newSyms = XkbResizeKeySyms(xkb, i + rep->firstKeySym, tmp); + if (newSyms == NULL) + return BadAlloc; +- if (newMap->nSyms > 0) +- _XkbReadBufferCopyKeySyms(buf, newSyms, newMap->nSyms); ++ if (newMap->nSyms > 0) { ++ if (_XkbReadBufferCopyKeySyms(buf, newSyms, newMap->nSyms) == 0) ++ return BadLength; ++ } + else + newSyms[0] = NoSymbol; + oldMap->kt_index[0] = newMap->ktIndex[0]; +-- +2.41.0 + |