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CVE-2022-2816: patch 9.0.0212: invalid memory access when compiling :unlet · vim/vim@dbdd16b
Out-of-bounds Read in GitHub repository vim/vim prior to 9.0.0211.
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patch 9.0.0212: invalid memory access when compiling :unlet
Problem: Invalid memory access when compiling :unlet. Solution: Don’t read past the end of the line.
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1 parent d1d8f6b commit dbdd16b62560413abcc3c8e893cc3010ccf31666
Showing 3 changed files with 17 additions and 2 deletions.
- test_vim9_cmd.vim
- version.c
- vim9cmds.c
@@ -1740,12 +1740,19 @@ def Test_lockvar()
lines =<< trim END
def _()
s:0([], s:0)
lockv
enddef
defcomp
END
v9.CheckScriptFailure(lines, 'E179’, 2)
v9.CheckScriptFailure(lines, 'E179’, 1)
lines =<< trim END
def T()
unlet
enddef
defcomp
END
v9.CheckScriptFailure(lines, 'E179’, 1)
enddef
def Test_substitute_expr()
@@ -735,6 +735,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
212,
/**/
211,
/**/
@@ -92,6 +92,12 @@ free_locals(cctx_T *cctx)
int
check_vim9_unlet(char_u *name)
{
if (*name == NUL)
{
semsg(_(e_argument_required_for_str), “unlet”);
return FAIL;
}
if (name[1] != ‘:’ || vim_strchr((char_u *)"gwtb", *name) == NULL)
{
// “unlet s:var” is allowed in legacy script.
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