Globalscape EFT: Out-of-bounds Read
CVE-2023-2989 is a critical-severity out-of-bounds read vulnerability in Globalscape EFT from Fortra, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 8.1.0.16 as the first without the flaw, so updating Globalscape EFT to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.97% chance of exploitation within 30 days, higher than 62% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Globalscape EFT to 8.1.0.16 or a later version.
- Update Eft Server to 8.1.0.16 or a later version.
- Read the advisory on kb.globalscape.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Fortra | Globalscape EFT | 8.0.0 up to, but not including, 8.1.0.16 | 8.1.0.16 |
| Globalscape | Eft Server | before 8.1.0.16 | 8.1.0.16 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H. Scored by NVD.
Official description
Fortra Globalscape EFT versions before 8.1.0.16 suffer from an out of bounds memory read in their administration server, which can allow an attacker to crash the service or bypass authentication if successfully exploited
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- rapid7.com/blog/post/2023/06/22/multiple-vulnerabilities-in-fortra-globalscape-eft-administration-server-fixe…Exploit, Third Party Advisory
Other vulnerabilities in Globalscape EFT
- 7.5 High severity
Recent Out-of-bounds Read vulnerabilities
- 7.7 High severity
- 7.5 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.1 High severity
Spotted an error? Tell us.