ALT-PU-2021-2243-1
Closed vulnerabilities
Published: 2019-07-01
BDU:2022-05961
Уязвимость компонента packet.c библиотеки реализации протокола SSH2 Libssh2, позволяющая нарушителю получить доступ к конфиденциальным данным, а также вызвать отказ в обслуживании
Severity: HIGH (8.1)
Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
References:
Published: 2019-10-22
Modified: 2024-11-21
Modified: 2024-11-21
CVE-2019-17498
In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted 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.
Severity: HIGH (8.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
References:
- openSUSE-SU-2019:2483
- openSUSE-SU-2019:2483
- http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html
- http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html
- https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/
- https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/
- https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498
- https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498
- https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480
- https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480
- https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c
- https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c
- [debian-lts-announce] 20191113 [SECURITY] [DLA 1991-1] libssh2 security update
- [debian-lts-announce] 20191113 [SECURITY] [DLA 1991-1] libssh2 security update
- [debian-lts-announce] 20211217 [SECURITY] [DLA 2848-1] libssh2 security update
- [debian-lts-announce] 20211217 [SECURITY] [DLA 2848-1] libssh2 security update
- [debian-lts-announce] 20230908 [SECURITY] [DLA 3559-1] libssh2 security update
- [debian-lts-announce] 20230908 [SECURITY] [DLA 3559-1] libssh2 security update
- FEDORA-2019-ec04c34768
- FEDORA-2019-ec04c34768
- FEDORA-2019-91529f19e4
- FEDORA-2019-91529f19e4
- https://security.netapp.com/advisory/ntap-20220909-0004/
- https://security.netapp.com/advisory/ntap-20220909-0004/