CVE-2018-13383
Fortinet FortiOS and FortiProxy: Out-of-bounds Write
As of , CVE-2018-13383 in Fortinet FortiOS and FortiProxy is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 10 January 2022
- US federal deadline
- 10 July 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.34Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users.
CISA's description
A heap buffer overflow in Fortinet FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier and FortiProxy 2.0.0, 1.2.8 and earlier in the SSL VPN web portal may cause the SSL VPN web service termination for logged in users due to a failure to properly handle javascript href data when proxying webpages.
The CVE record's description, from fortinet
- CVE published
- 29 May 2019
- Assigned by
- fortinet
- CVSS
- 4.3 Medium (CVSS 3.1, from the CNA)
- CWE-787
- Out-of-bounds Write
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- partial
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
FortiOS and FortiProxy: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2024-55591Authentication Bypass | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use; EPSS 0.94 | 0.94 | ||
| CVE-2018-13382Improper Authorization | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use; EPSS 0.82 | 0.82 | ||
| CVE-2025-24472Authentication Bypass | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use | 0.07 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org