An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt req…
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
https://cwe.mitre.org/data/definitions/190.html →Open in CWE collection →This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
https://capec.mitre.org/data/definitions/92.html →Open in CAPEC collection →| Product | Vendor | Status |
|---|---|---|
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked | |
| libssh2 | Tracked |