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Debian Security Advisory DSA 3251-1 (dnsmasq - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.4

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

7 months ago

Share

Summary

Nick Sampanis discovered that dnsmasq, a small caching DNS proxy and DHCP/TFTP server, did not properly check the return value of the setup_reply() function called during a TCP connection, which is used then as a size argument in a function which writes data on the client's connection. A remote attacker could exploit this issue via a specially crafted DNS request to cause dnsmasq to crash, or potentially to obtain sensitive information from process memory.

Affected Software

Affected Software

dnsmasq on Debian Linux

Detection Method

Detection Method

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

Solution

Solution

For the oldstable distribution (wheezy), this problem has been fixed in version 2.62-3+deb7u2. For the stable distribution (jessie), this problem has been fixed in version 2.72-3+deb8u1. For the testing distribution (stretch) and the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your dnsmasq packages.

Common Vulnerabilities and Exposures (CVE)

References

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multipass launch -c 2 -m 6G -d 20G -n mageni 20.04 && multipass shell mageni

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