Upstream information
Description
A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is called secret_hash and the other session_id. Initially, both of them are the same, but after key re-exchange, previous session_id is kept and used as an input to new secret_hash. Historically, both of these buffers had shared length variable, which worked as long as these buffers were same. But the key re-exchange operation can also change the key exchange method, which can be based on hash of different size, eventually creating "secret_hash" of different size than the session_id has. This becomes an issue when the session_id memory is zeroed or when it is used again during second key re-exchange.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
National Vulnerability Database | |
---|---|
Base Score | 4 |
Vector | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Access Vector | Network |
Access Complexity | Low |
Authentication | Single |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | Partial |
National Vulnerability Database | SUSE | |
---|---|---|
Base Score | 6.5 | 3.5 |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L |
Access Vector | Network | Network |
Access Complexity | Low | Low |
Privileges Required | Low | Low |
User Interaction | None | Required |
Scope | Unchanged | Unchanged |
Confidentiality Impact | None | None |
Integrity Impact | None | None |
Availability Impact | High | Low |
CVSSv3 Version | 3.1 | 3.1 |
List of released packages
Product(s) | Fixed package version(s) | References |
---|---|---|
SUSE Linux Enterprise Desktop 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.3 |
| Patchnames: SUSE Linux Enterprise Module for Basesystem 15 SP4 GA libssh-config-0.9.6-150400.1.5 |
openSUSE Leap 15.4 |
| Patchnames: openSUSE Leap 15.4 GA libssh-config-0.9.6-150400.1.5 |
openSUSE Tumbleweed |
| Patchnames: openSUSE Tumbleweed GA libssh-config-0.9.6-1.2 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
Product(s) | Source package | State |
---|---|---|
SUSE CaaS Platform 4.0 | libssh | Not affected |
SUSE CaaS Platform 4.5 | libssh | Not affected |
SUSE Enterprise Storage 6 | libssh | Not affected |
SUSE Enterprise Storage 7 | libssh | Not affected |
SUSE Linux Enterprise Desktop 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise Desktop 15 SP3 | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 12 SP5 | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 LTSS | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 ESPOS | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS | libssh | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP3 | libssh | Not affected |
SUSE Linux Enterprise Micro 5.0 | libssh | Not affected |
SUSE Linux Enterprise Micro 5.1 | libssh | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP3 | libssh | Not affected |
SUSE Linux Enterprise Server 12 SP4 ESPOS | libssh | Not affected |
SUSE Linux Enterprise Server 12 SP4 LTSS | libssh | Not affected |
SUSE Linux Enterprise Server 12 SP5 | libssh | Not affected |
SUSE Linux Enterprise Server 15 ESPOS | libssh | Not affected |
SUSE Linux Enterprise Server 15 LTSS | libssh | Not affected |
SUSE Linux Enterprise Server 15 SP1 LTSS | libssh | Not affected |
SUSE Linux Enterprise Server 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise Server 15 SP2 LTSS | libssh | Not affected |
SUSE Linux Enterprise Server 15 SP3 | libssh | Not affected |
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 | libssh | Not affected |
SUSE Linux Enterprise Server Business Critical Linux 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP4 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP5 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP1 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | libssh | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | libssh | Not affected |
SUSE Linux Enterprise Storage 7 | libssh | Not affected |
SUSE Linux Enterprise Storage 7.1 | libssh | Not affected |
SUSE Manager Proxy 4.0 | libssh | Analysis |
SUSE Manager Proxy 4.1 | libssh | Not affected |
SUSE Manager Proxy 4.2 | libssh | Not affected |
SUSE Manager Retail Branch Server 4.0 | libssh | Analysis |
SUSE Manager Retail Branch Server 4.1 | libssh | Not affected |
SUSE Manager Retail Branch Server 4.2 | libssh | Not affected |
SUSE Manager Server 4.0 | libssh | Analysis |
SUSE Manager Server 4.1 | libssh | Not affected |
SUSE Manager Server 4.2 | libssh | Not affected |
SUSE OpenStack Cloud 9 | libssh | Not affected |
SUSE OpenStack Cloud Crowbar 9 | libssh | Not affected |