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.
References
Configurations
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History
22 Dec 2023, 10:15
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References |
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07 Nov 2023, 03:38
Type | Values Removed | Values Added |
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CWE | CWE-787 | |
References |
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07 Oct 2022, 14:16
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CWE |
26 May 2022, 15:36
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First Time |
Netapp
Netapp cloud Backup |
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CPE | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
04 Mar 2022, 20:04
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First Time |
Oracle
Oracle mysql Workbench |
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CPE | cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* | |
References | (MISC) https://www.oracle.com/security-alerts/cpujan2022.html - Patch, Third Party Advisory |
07 Feb 2022, 16:16
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18 Oct 2021, 11:57
Type | Values Removed | Values Added |
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CPE | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
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References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SVWAAB2XMKEUMPMDALINKAA4U2QM4LNG/ - Mailing List, Third Party Advisory | |
References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DRK67AJCWYYVAGF5SGAHNZXCX3PN3ZFP/ - Mailing List, Third Party Advisory | |
References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKYD3ZRAMDAQX3ZW6THHUF3GXN7FF6B4/ - Mailing List, Third Party Advisory | |
References | (CONFIRM) https://security.netapp.com/advisory/ntap-20211004-0003/ - Third Party Advisory |
07 Oct 2021, 19:15
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04 Oct 2021, 19:15
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29 Sep 2021, 03:15
Type | Values Removed | Values Added |
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CWE | CWE-119 | |
References |
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09 Sep 2021, 01:02
Type | Values Removed | Values Added |
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CVSS |
v2 : v3 : |
v2 : 4.0
v3 : 6.5 |
References | (DEBIAN) https://www.debian.org/security/2021/dsa-4965 - Third Party Advisory | |
References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1978810 - Issue Tracking, Third Party Advisory | |
CPE | cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
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CWE | CWE-787 |
31 Aug 2021, 20:15
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31 Aug 2021, 17:22
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New CVE |
Information
Published : 2021-08-31 17:15
Updated : 2023-12-22 10:15
NVD link : CVE-2021-3634
Mitre link : CVE-2021-3634
CVE.ORG link : CVE-2021-3634
JSON object : View
Products Affected
libssh
- libssh
redhat
- enterprise_linux
- virtualization
oracle
- mysql_workbench
netapp
- cloud_backup
debian
- debian_linux
fedoraproject
- fedora
CWE
CWE-787
Out-of-bounds Write