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[CVE-2023-43985] Improper neutralization of SQL parameter in SunnyToo - Blog Search module for PrestaShop
In the module “Blog Search” (stblogsearch) up to version 1.0 from SunnyToo for PrestaShop, a guest can perform SQL injection in affected versions.
Summary
- CVE ID: CVE-2023-43985
- Published at: 2024-01-18
- Platform: PrestaShop
- Product: stblogsearch
- Impacted release: <= 1.0 [See note below]
- Product author: SunnyToo
- Weakness: CWE-89
- Severity: critical (9.8)
Description
Method StBlogSearchClass::prepareSearch has sensitive SQL calls that can be executed with a trivial http call and exploited to forge a SQL injection.
This exploit uses a PrestaShop front controller and most attackers can conceal the module controller’s path during the exploit, so you will never know within your conventional frontend logs that it exploits this vulnerability. You will only see “POST /” inside your conventional frontend logs. Activating the AuditEngine of mod_security (or similar) is the only way to get data to confirm this exploit.
Note : the author do not have a compliant semver versionning on these modules, only on its themes which loads tens of modules. According to him, it’s fixed on Panda Theme 2.8 and Transform Theme 4.7.0. So, according to its advices, you must update the whole theme.
CVSS base metrics
- Attack vector: network
- Attack complexity: low
- Privilege required: none
- User interaction: none
- Scope: unchanged
- Confidentiality: high
- Integrity: high
- Availability: high
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Possible malicious usage
- Obtain admin access
- Remove data from the associated PrestaShop
- Copy/paste data from sensitive tables to FRONT to expose tokens and unlock admins’s ajax scripts
- Rewrite SMTP settings to hijack emails
Patch from 1.0
--- 1.0/modules/stblogsearch/classes/StBlogSearchClass.php
+++ XXX/modules/stblogsearch/classes/StBlogSearchClass.php
...
foreach ($words as $key => $search)
{
if (empty($search) || strlen($search) < (int)Configuration::get('ST_BS_SEARCH_MINWORDLEN'))
continue;
$search_extra = '';
if (Configuration::get('ST_BS_SEARCH_NAME'))
- $search_extra .= ' OR bl.name LIKE "%'.$search.'%"';
+ $search_extra .= ' OR bl.name LIKE "%'.pSQL($search).'%"';
if (Configuration::get('ST_BS_SEARCH_AUTHOR
- $search_extra .= ' OR bl.author LIKE "%'.$search.'%"';
+ $search_extra .= ' OR bl.author LIKE "%'.pSQL($search).'%"';
if (Configuration::get('ST_BS_SEARCH_CATEGORY'))
- $search_extra .= ' OR bcl.name LIKE "%'.$search.'%"';
+ $search_extra .= ' OR bcl.name LIKE "%'.pSQL($search).'%"';
if (Configuration::get('ST_BS_SEARCH_SHORT_CONTENT'))
- $search_extra .= ' OR bl.content_short LIKE "%'.$search.'%"';
+ $search_extra .= ' OR bl.content_short LIKE "%'.pSQL($search).'%"';
if (Configuration::get('ST_BS_SEARCH_CONTENT'))
- $search_extra .= ' OR bl.content LIKE "%'.$search.'%"';
+ $search_extra .= ' OR bl.content LIKE "%'.pSQL($search).'%"';
if (!$search_extra)
return false;
// Search in blog lang and category lang.
$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
SELECT bl.id_st_blog FROM `'._DB_PREFIX_.'st_blog_lang` bl
INNER JOIN `'._DB_PREFIX_.'st_blog_shop` bs ON (bs.id_st_blog=bl.id_st_blog)
LEFT JOIN `'._DB_PREFIX_.'st_blog_category_blog` bcb ON (bl.id_st_blog=bcb.id_st_blog)
LEFT JOIN `'._DB_PREFIX_.'st_blog_category_lang` bcl ON (bcb.id_st_blog_category=bcl.id_st_blog_category
AND bcl.`id_lang` = '.$id_lang.')
WHERE bl.`id_lang` ='.$id_lang.'
AND bs.`id_shop` = '.$id_shop.'
AND ('.trim($search_extra, ' OR ').')
');
if($result)
foreach ($result as $row)
$id_array[] = $row['id_st_blog'];
if (Configuration::get('ST_BS_SEARCH_TAG'))
{
// Search in blog tag.
$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
SELECT id_st_blog FROM `'._DB_PREFIX_.'st_blog_tag` t
INNER JOIN `'._DB_PREFIX_.'st_blog_tag_map` tm
ON (t.id_st_blog_tag=tm.id_st_blog_tag)
WHERE id_lang = '.$id_lang.'
- AND name like "%'.$search.'%"
+ AND name like "%'.pSQL($search).'%"
');
if($result)
foreach ($result as $row)
$id_array[] = $row['id_st_blog'];
}
}
Other recommendations
- It’s recommended to upgrade to the latest version of the module stblogsearch.
- To help improve the security of your PrestaShop installation, we recommend upgrading to the latest version. One of the benefits of upgrading is that it will disable the use of multiquery executions (separated by semicolons). However, please be aware that this will not protect your shop against SQL injection attacks that use the UNION clause to steal data. Additionally, it’s important to note that PrestaShop includes a function called pSQL, which includes a strip_tags function. This helps protect your shop against Stored XSS (also known as XSS T2) of Category 1. If a pSQL function is missing, it could potentially expose your project to critical Stored XSS vulnerabilities due to edge cases. Therefore, it’s crucial to ensure that all relevant functions are properly implemented and used consistently throughout your project.
- Change the default database prefix
ps_with a new longer, arbitrary prefix. Nevertheless, be warned that this is useless against blackhats with DBA senior skills because of a design vulnerability in DBMS - Activate OWASP 942’s rules on your WAF (Web application firewall), be warned that you will probably break your backoffice and you will need to pre-configure some bypasses against this set of rules.
Timeline
| Date | Action |
|---|---|
| 2023-08-29 | Issue discovered during a code review by TouchWeb.fr |
| 2023-08-29 | Contact Author to confirm versions scope |
| 2023-08-29 | Author confirm versions scope |
| 2023-09-21 | Request a CVE ID |
| 2023-09-27 | Received CVE ID |
| 2024-01-18 | Publish this security advisory |
Links
DISCLAIMER: The French Association Friends Of Presta (FOP) acts as an intermediary to help hosting this advisory. While we strive to ensure the information and advice provided are accurate, FOP cannot be held liable for any consequences arising from reported vulnerabilities or any subsequent actions taken.
This advisory and patch is licensed under CC BY-SA 4.0
