CVE-2013-0176
Ubuntu Security Notice USN-1707-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.
La función publickey_from_privatekey en libssh anterior a v0.5.4, cuando ningun algoritmo coincide durante la negociacion, permite a atacantes remotos causar una denegación de servicio (referencia NULL y caída de la aplicación) mediante un paquete "Client: Diffie-Hellman Key Exchange Init"
Multiple double free flaws, buffer overflow flaws, invalid free flaws, and improper overflow checks in libssh before 0.5.3 could enable a denial of service attack against libssh clients, or possibly arbitrary code execution. Yong Chuan Koh discovered that libssh incorrectly handled certain negotiation requests. A remote attacker could use this to cause libssh to crash, resulting in a denial of service.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2012-12-06 CVE Reserved
- 2013-01-29 CVE Published
- 2024-08-06 CVE Updated
- 2025-07-07 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-399: Resource Management Errors
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilities/81595 | Vdb Entry |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release | 2017-08-29 |
| URL | Date | SRC |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html | 2017-08-29 | |
| http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html | 2017-08-29 | |
| http://secunia.com/advisories/51982 | 2017-08-29 | |
| http://www.ubuntu.com/usn/USN-1707-1 | 2017-08-29 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | <= 0.5.3 Search vendor "Libssh" for product "Libssh" and version " <= 0.5.3" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.4.7 Search vendor "Libssh" for product "Libssh" and version "0.4.7" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.4.8 Search vendor "Libssh" for product "Libssh" and version "0.4.8" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.5.0 Search vendor "Libssh" for product "Libssh" and version "0.5.0" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.5.0 Search vendor "Libssh" for product "Libssh" and version "0.5.0" | rc1 |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.5.1 Search vendor "Libssh" for product "Libssh" and version "0.5.1" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | 0.5.2 Search vendor "Libssh" for product "Libssh" and version "0.5.2" | - |
Affected
| ||||||