Security readout for executives and security teams
Plain-English summary
A stolen FortiOS SSL-VPN portal cookie may remain reusable after the user logs out or the session expires. This could let an attacker regain portal access without credentials, exposing data or permitting limited unauthorized actions. Exploitation requires possession of a valid cookie and is rated medium severity.
Executive priority
Schedule prompt remediation for affected, externally reachable SSL-VPN portals, especially those supporting privileged access. This is not a critical unauthenticated takeover, but stolen-cookie reuse weakens logout and session-expiration controls. Escalate urgency if cookie theft, suspicious VPN access, or endpoint compromise is suspected.
Technical view
CVE-2024-50562 is a CWE-613 insufficient session expiration flaw affecting FortiOS SSL-VPN 7.6.0, 7.4.6 and earlier, 7.2.10 and earlier, and all 7.0 and 6.4 releases. It is network-accessible but high complexity, with low confidentiality and integrity impact and no availability impact. The supplied records do not establish FortiPAM or FortiProxy as affected.
Likely exposure
Exposure is most likely where an affected FortiOS release provides an SSL-VPN portal and an attacker can obtain a user's portal cookie. Internet-facing portals and environments with weak endpoint or cookie protection deserve faster review. Systems without SSL-VPN portal use are unlikely to expose the described path.
Exploitation context
The CVSS vector records proof-of-concept exploit maturity, but the supplied bundle provides no evidence of active exploitation and states that the CVE is not in KEV. The prerequisite is possession of a previously valid SSL-VPN portal cookie; this is not described as unauthenticated access without such a cookie.
Researcher notes
The weakness concerns server-side invalidation or rejection of an SSL-VPN portal cookie after logout or expiration. Safe assessment should verify product version, feature exposure, and post-expiration rejection in an authorized environment. The bundle does not identify fixed versions or a vendor-endorsed workaround, so remediation details must be confirmed through FG-IR-24-339.
Mitigation direction
- Review Fortinet advisory FG-IR-24-339 for current fixed releases and supported remediation guidance.
- Upgrade affected FortiOS installations according to Fortinet's documented upgrade path and compatibility requirements.
- If compromise is suspected, follow Fortinet guidance and organizational incident-response procedures for SSL-VPN sessions.
- Prioritize internet-facing SSL-VPN portals and systems serving privileged or sensitive users.
Validation and detection
- Inventory FortiOS versions and identify systems where the SSL-VPN portal is enabled.
- Compare each deployed release against the affected version ranges and Fortinet's current advisory.
- Confirm remediated appliances run a Fortinet-designated fixed release after maintenance.
- Review authentication records for cookie-based access occurring after logout or expected session expiration.
- Verify FortiPAM and FortiProxy status separately; the supplied product entries mark them unaffected by default.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-613: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-50562 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:X/RC:R
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:X/RC:R2.22.5fortinetVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:X/RC:R
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.fortinet.com/psirt/FG-IR-24-339CVE reference, fortinet
- https://cert-portal.siemens.com/productcert/html/ssa-864900.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Session Expiration
Insufficient Session Expiration represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.