CVE-2019-13115
Published: 16 July 2019
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.
From the Ubuntu security team
It was discovered that libssh2 incorrectly handled Diffie Hellman key exchange. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
Medium
CVSS 3 base score: 8.1
Status
| Package | Release | Status |
|---|---|---|
|
libssh2 Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| cosmic |
Ignored
(reached end-of-life)
|
|
| disco |
Ignored
(reached end-of-life)
|
|
| eoan |
Ignored
(reached end-of-life)
|
|
| focal |
Needed
|
|
| groovy |
Ignored
(reached end-of-life)
|
|
| hirsute |
Not vulnerable
(1.9.0-1)
|
|
| impish |
Not vulnerable
(1.9.0-1)
|
|
| jammy |
Not vulnerable
(1.9.0-1)
|
|
| precise |
Does not exist
|
|
| trusty |
Needed
|
|
| upstream |
Released
(1.9.0, 1.4.3-4.1+deb8u4)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
|
Patches: upstream: https://github.com/libssh2/libssh2/commit/ff1b155731ff8f790f12d980911d9fd84d0e1598 |
||