CVE-2013-4548
Slackware Security Advisory - openssh Updates
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.
La función mm_newkeys_from_blob en monitor_wrap.c de sshd en OpenSSH 6.2 y 6.3, cuando se utiliza el cifrado AES-GCM, no inicia correctamente la memoria para una estructura de datos de contexto MAC, lo que permite a usuarios remotos autenticados evadir intencionadamente ForceCommand y restricciones login-shell a través de un paquete de datos que proporciona una dirección de rellamada manipulada.
A memory corruption vulnerability exists in the post-authentication sshd process when an AES-GCM cipher (aes128-gcm@openssh.com or aes256-gcm@openssh.com) is selected during key exchange. If exploited, this vulnerability might permit code execution with the privileges of the authenticated user, thereby allowing a malicious user with valid credentials to bypass shell or command restrictions placed on their account.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2013-06-12 CVE Reserved
- 2013-11-08 CVE Published
- 2024-08-06 CVE Updated
- 2025-05-04 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-264: Permissions, Privileges, and Access Controls
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| http://openwall.com/lists/oss-security/2013/11/08/3 | Mailing List |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html | 2019-10-09 | |
| http://marc.info/?l=bugtraq&m=141576985122836&w=2 | 2019-10-09 | |
| http://www.openssh.com/txt/gcmrekey.adv | 2019-10-09 | |
| http://www.ubuntu.com/usn/USN-2014-1 | 2019-10-09 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Openbsd Search vendor "Openbsd" | Openssh Search vendor "Openbsd" for product "Openssh" | 6.2 Search vendor "Openbsd" for product "Openssh" and version "6.2" | - |
Affected
| ||||||
| Openbsd Search vendor "Openbsd" | Openssh Search vendor "Openbsd" for product "Openssh" | 6.3 Search vendor "Openbsd" for product "Openssh" and version "6.3" | - |
Affected
| ||||||