CVE-2019-13115

In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.

CVSS v3.1

8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

CVSS v2.0

5.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:P

EPSS

11.66% chance of exploitation in the next 30 days, 96th percentile

Published

2019-07-16

Updated

2024-08-04

Proof-of-concept exploits (2)

• CSSProject/libssh2-Exploit0★ · 2019-10-03
• viz27/Libssh2-Exploit1★ · 2020-08-17

References

• CVE Record
• NVD entry

Related

• CVE-2019-13113
• CVE-2019-13127
• CVE-2019-13112
• CVE-2019-13131
• CVE-2019-13111
• CVE-2019-13132