CVE-2016-0787
libssh2: bits/bytes confusion resulting in truncated Diffie-Hellman secret length
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."
La función diffie_hellman_sha256 en kex.c en libssh2 en versiones anteriores a 1.7.0 trunca de manera incorrecta secretos a 128 o 256 bits, lo que hace más fácil para atacantes man-in-the-middle descifrar o interceptar sesiones SSH a través de vectores no especificados, también conocido como "bits/bytes confusion bug".
A type confusion issue was found in the way libssh2 generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2015-12-16 CVE Reserved
- 2016-03-10 CVE Published
- 2023-09-24 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-704: Incorrect Type Conversion or Cast
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html | X_refsource_confirm |
|
| http://www.securityfocus.com/bid/82514 | Vdb Entry | |
| https://bto.bluecoat.com/security-advisory/sa120 | X_refsource_confirm | |
| https://kc.mcafee.com/corporate/index?page=content&id=SB10156 | X_refsource_confirm | |
| https://puppet.com/security/cve/CVE-2016-0787 | X_refsource_confirm |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.libssh2.org/CVE-2016-0787.patch | 2018-10-30 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 22 Search vendor "Fedoraproject" for product "Fedora" and version "22" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 23 Search vendor "Fedoraproject" for product "Fedora" and version "23" | - |
Affected
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| Opensuse Search vendor "Opensuse" | Opensuse Search vendor "Opensuse" for product "Opensuse" | 13.2 Search vendor "Opensuse" for product "Opensuse" and version "13.2" | - |
Affected
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| Libssh2 Search vendor "Libssh2" | Libssh2 Search vendor "Libssh2" for product "Libssh2" | <= 1.6.0 Search vendor "Libssh2" for product "Libssh2" and version " <= 1.6.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
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