Debian Security Advisory DSA 3222-1 (chrony - security update)

Published: 2015-04-11 22:00:00
CVE Author: NIST National Vulnerability Database

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

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
chrony on Debian Linux

Recommendations:
For the stable distribution (wheezy), these problems have been fixed in version 1.24-3.1+deb7u3. For the unstable distribution (sid), these problems have been fixed in version 1.30-2. We recommend that you upgrade your chrony Linux Distribution Packages.

Summary:
Miroslav Lichvar of Red Hat discovered multiple vulnerabilities in chrony, an alternative NTP client and server: CVE-2015-1821 Using particular address/subnet pairs when configuring access control would cause an invalid memory write. This could allow attackers to cause a denial of service (crash) or execute arbitrary code. CVE-2015-1822 When allocating memory to save unacknowledged replies to authenticated command requests, a pointer would be left uninitialized, which could trigger an invalid memory write. This could allow attackers to cause a denial of service (crash) or execute arbitrary code. CVE-2015-1853 When peering with other NTP hosts using authenticated symmetric association, the internal state variables would be updated before the MAC of the NTP messages was validated. This could allow a remote attacker to cause a denial of service by impeding synchronization between NTP peers.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

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

https://nvd.nist.gov/vuln/detail/CVE-2015-1821
https://nvd.nist.gov/vuln/detail/CVE-2015-1822
https://nvd.nist.gov/vuln/detail/CVE-2015-1853

References:

http://www.debian.org/security/2015/dsa-3222.html

Severity
High
CVSS Score
10.0
Published
2015-04-11
Modified
2019-03-18
Category
Debian Local Security Checks

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