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Extra modification #3520

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d9bf992
Extra modification
JonathanBerrew Mar 18, 2026
100303d
Update apache2/mod_security2.c
JonathanBerrew Apr 29, 2026
b877991
Lazily initialize msc_rule_mptmp for logging variable construction
JonathanBerrew May 6, 2026
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6 changes: 5 additions & 1 deletion apache2/mod_security2.c
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Original file line number Diff line number Diff line change
Expand Up @@ -196,7 +196,7 @@
msc_string *var = (msc_string *)apr_pcalloc(msr->mp, sizeof(msc_string));

var->value = (char *)actionset->intercept_pause;
var->value_len = strlen(actionset->intercept_pause);

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'=': conversion from 'size_t' to 'unsigned int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]

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'=': conversion from 'size_t' to 'unsigned int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]
expand_macros(msr, var, NULL, msr->mp);

pause = atoi(var->value);
Expand Down Expand Up @@ -343,7 +343,7 @@
msc_string *var = (msc_string *)apr_pcalloc(msr->mp, sizeof(msc_string));

var->value = (char *)actionset->intercept_uri;
var->value_len = strlen(actionset->intercept_uri);

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'=': conversion from 'size_t' to 'unsigned int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]

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'=': conversion from 'size_t' to 'unsigned int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]
expand_macros(msr, var, NULL, msr->mp);

apr_table_setn(msr->r->headers_out, "Location", var->value);
Expand Down Expand Up @@ -1217,7 +1217,7 @@
}
}

limit = limit - strlen(str2) - 5;

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'=': conversion from 'size_t' to 'int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]

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'=': conversion from 'size_t' to 'int', possible loss of data [D:\a\ModSecurity\ModSecurity\iis\build\modsecurityiis.vcxproj]
if (limit <= 0) {
msr_log(msr, 1, "Audit Log: Atomic PIPE write buffer too small: %d", PIPE_BUF);
return;
Expand Down Expand Up @@ -1664,7 +1664,11 @@

/* Add the MODSEC_a.b define */
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*(char **)apr_array_push(ap_server_config_defines) = apr_psprintf(mp, "MODSEC_%s.%s", MODSEC_VERSION_MAJOR, MODSEC_VERSION_MINOR);

*(char **)apr_array_push(ap_server_config_defines) = apr_pstrdup(mp, "MODSEC_AnalyseMultipartHeaders");
*(char **)apr_array_push(ap_server_config_defines) = apr_pstrdup(mp, "MODSEC_ARGS_COMBINED_SIZE_NONAME");
#ifndef WITH_PCRE
*(char **)apr_array_push(ap_server_config_defines) = apr_pstrdup(mp, "MODSEC_PCRE2");
#endif
#if (!defined(NO_MODSEC_API))
/* Export optional functions. */
APR_REGISTER_OPTIONAL_FN(modsec_register_tfn);
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2 changes: 2 additions & 0 deletions apache2/msc_util.c
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Expand Up @@ -2261,6 +2261,8 @@ char *construct_single_var(modsec_rec *msr, char *name) {
msre_var *vx = NULL;
char *my_error_msg = NULL;

if (msr->msc_rule_mptmp == NULL) return NULL;

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construct_single_var now returns NULL whenever msr->msc_rule_mptmp is NULL. msr->msc_rule_mptmp is initialized to NULL at transaction creation (apache2/mod_security2.c:582) and is only created during rule processing (apache2/re.c:3362-3368), so requests that reach logging without any rule execution will stop producing log variables (instead of being computable from msr->mp). Consider lazily creating msc_rule_mptmp here (e.g., apr_pool_create with parent msr->mp) or otherwise providing a safe fallback pool rather than returning NULL.

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/* Extract variable name and its parameter from the script. */
varname = apr_pstrdup(msr->mp, name);
if (varname == NULL) return NULL;
Expand Down
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