Amazon Linux Local Check: ALAS-2015-592

Published: 2015-09-08 11:17:13
CVE Author: NIST National Vulnerability Database

Technical Details:
The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c. (CVE-2015-6563 )Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request. (CVE-2015-6564 )

Recommendations:
Run yum update openssh to update your system.

Solution Type:
Vendor Patch

CVSS Base Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C

Detection Type:
Linux Distribution Package

Summary:
Amazon Linux Local Security Checks

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-6563
https://nvd.nist.gov/vuln/detail/CVE-2015-6564

References:

https://alas.aws.amazon.com/ALAS-2015-592.html

Severity
Medium
CVSS Score
6.9
Published
2015-09-08
Modified
2018-10-01
Category
Amazon Linux Local Security Checks

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