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Debian Security Advisory DSA 2652-1 (libxml2 - external entity expansion)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.8

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

9 years ago

Modified

Modified

1 year ago

Summary

Brad Hill of iSEC Partners discovered that many XML implementations are vulnerable to external entity expansion issues, which can be used for various purposes such as firewall circumvention, disguising an IP address, and denial-of-service. libxml2 was susceptible to these problems when performing string substitution during entity expansion.

Affected Software

Affected Software

libxml2 on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (squeeze), these problems have been fixed in version 2.7.8.dfsg-2+squeeze7. For the testing (wheezy) and unstable (sid) distributions, these problems have been fixed in version 2.8.0+dfsg1-7+nmu1. We recommend that you upgrade your libxml2 packages.

Common Vulnerabilities and Exposures (CVE)