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Debian LTS: Security Advisory for log4net (DLA-2211-1)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

Summary

The remote host is missing an update for the 'log4net' package(s) announced via the DLA-2211-1 advisory.

Insight

Insight

It was discovered that there was an XML external entity vulnerability in log4net, a logging API for the ECMA Common Language Infrastructure (CLI), sometimes referred to as 'Mono'. This type of attack occurs when XML input containing a reference to an internet-faced entity is processed by a weakly configured XML parser. This attack may lead to the disclosure of confidential data, denial of service, server side request forgery as well as other system impacts.

Affected Software

Affected Software

'log4net' package(s) on Debian Linux.

Detection Method

Detection Method

Checks if a vulnerable package version is present on the target host.

Solution

Solution

For Debian 8 'Jessie', this issue has been fixed in log4net version 1.2.10+dfsg-6+deb8u1. We recommend that you upgrade your log4net packages.