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    Debian: DSA-3222-1: chrony security update

    Date
    157
    Posted By
    Miroslav Lichvar of Red Hat discovered multiple vulnerabilities in chrony, an alternative NTP client and server: CVE-2015-1821
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3222-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                        Alessandro Ghedini
    April 12, 2015                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : chrony
    CVE ID         : CVE-2015-1821 CVE-2015-1822 CVE-2015-1853
    Debian Bug     : 782160
    
    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.
    
    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 packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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