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Amazon Linux: Security Advisory (ALAS-2015-572)

Information

Severity

Severity

High

Family

Family

Amazon Linux Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.2

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

8 years ago

Modified

Modified

2 years ago

Summary

The remote host is missing an update announced via the referenced Security Advisory.

Insight

Insight

It was found that libuser, as used in the chfn userhelper functionality, does not properly filter out newline characters, which allows an authenticated local attacker to corrupt the /etc/passwd file and cause denial-of-service against the system. (CVE-2015-3245 )A flaw was found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3246 )

Solution

Solution

Run yum update usermode libuser to update your system.

Common Vulnerabilities and Exposures (CVE)