CVE-2009-0543
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CVE Descriptions
ProFTPD Server 1.3.1, with NLS support enabled, allows remote attackers to bypass SQL injection protection mechanisms via invalid, encoded multibyte characters, which are not properly handled in (1) mod_sql_mysql and (2) mod_sql_postgres.
CVE Informations
Related Weaknesses
| Weakness Name | Source | |
|---|---|---|
| Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. |
Metrics
| Metrics | Score | Severity | CVSS Vector | Source |
|---|---|---|---|---|
| V2 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P | nvd@nist.gov |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 8037
Publication date : 2009-02-09 23h00 +00:00
Author : gat3way
EDB Verified : Yes
Just found out a problem with proftpd's sql authentication. The problem is easily reproducible if you login with username like:
USER %') and 1=2 union select 1,1,uid,gid,homedir,shell from users; --
and a password of "1" (without quotes).
which leads to a successful login. Different account logins can be made successful using the limit clase (e.g appending "LIMIT 5,1" will make you login with as the 5th account in the users table).
As far as I can see in the mysql logs the query becomes:
SELECT userid, passwd, uid, gid, homedir, shell FROM users WHERE (userid='{UNKNOWN TAG}') and 1=2 union select 1,1,uid,gid,homedir,shell from users limit 1,1; -- ') LIMIT 1
I think the problem lies in the handling of the "%" character (probably that's some way to sanitize input to avoid format string things?).
Anyway, %' effectively makes the single quote unescaped and that eventually allows for an SQL injection during login.
# milw0rm.com [2009-02-10]
Products Mentioned
Configuraton 0
Proftpd>>Proftpd >> Version 1.3.1
- Proftpd>>Proftpd >> Version 1.3.1 (Open CPE detail)
- Proftpd>>Proftpd >> Version 1.3.1 (Open CPE detail)
- Proftpd>>Proftpd >> Version 1.3.1 (Open CPE detail)
- Proftpd>>Proftpd >> Version 1.3.1 (Open CPE detail)
References
http://www.mandriva.com/security/advisories?name=MDVSA-2009:061
Tags : vendor-advisory, x_refsource_MANDRIVA
Tags : vendor-advisory, x_refsource_MANDRIVA
