Very High
CVE-2023-2989
CVE ID
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CVE-2023-2989
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
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
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Ratings
-
Attacker ValueVery High
-
ExploitabilityVery Low
Technical Analysis
At its core, this is a blind out of bounds memory read in the packet parser for the Fortra Globalscape admin server. That means that you can trick the packet parser into leaving the memory bounds of its packet and processing other memory as if it was part of the packet. The most likely result is sending the parser into unallocated memory and crashing the process.
However, if an attacker can correctly guess the offset of another user’s login packet (which isn’t as crazy as it sounds – packets are typically close together on the heap), they can use the other user’s login and bypass authentication altogether.
Without some sorta heap massaging or very lucky guessing, this is going to be very difficult to exploit, but it’s definitely interesting!
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General Information
Vendors
- globalscape
Products
- eft server
References
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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