diff options
| author | Cy Schubert <cy@FreeBSD.org> | 2019-03-07 13:32:42 +0000 |
|---|---|---|
| committer | Cy Schubert <cy@FreeBSD.org> | 2019-03-07 13:32:42 +0000 |
| commit | 693adda4651188ede53a5069a946ea6922e378f9 (patch) | |
| tree | e9b13420161bdda11e902aa886616b6a0e5c9eed | |
| parent | 45a10a00a27ec73f44dda0c88a69d4fa28e79977 (diff) | |
| download | freebsd-ports-693adda4651188ede53a5069a946ea6922e378f9.zip | |
Document crafted ull dereference ntp attack.
Security: CVE-2019-8936
Obtained from: nwtime.org
| -rw-r--r-- | security/vuxml/vuln.xml | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/security/vuxml/vuln.xml b/security/vuxml/vuln.xml index 0bfbf36ca743..5be163aab7cb 100644 --- a/security/vuxml/vuln.xml +++ b/security/vuxml/vuln.xml @@ -58,6 +58,55 @@ Notes: * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> <vuxml xmlns="http://www.vuxml.org/apps/vuxml-1"> + <vuln vid="c2576e14-36e2-11e9-9eda-206a8a720317"> + <topic>ntp -- Crafted null dereference attack from a trusted source with an authenticated mode 6 packet</topic> + <affects> + <package> + <name>ntp</name> + <range><lt>4.2.8p13</lt></range> + </package> + <package> + <name>FreeBSD</name> + <range><ge>12.0</ge><lt>12.0_2</lt></range> + <range><ge>11.2</ge><lt>11.2_8</lt></range> + </package> + </affects> + <description> + <body xmlns="http://www.w3.org/1999/xhtml"> + <p>Network Time Foundation reports:</p> + <blockquote cite="http://support.ntp.org/bin/view/Main/SecurityNotice#XXX-fill-this-in-XXX"> + <p>A crafted malicious authenticated mode 6 (ntpq) packet from a + permitted network address can trigger a NULL pointer dereference, + crashing ntpd.</p> + <p>Note that for this attack to work, the sending + system must be on an address that the target's ntpd accepts mode 6 + packets from, and must use a private key that is specifically + listed as being used for mode 6 authorization.</p> + <p>Impact: The ntpd daemon can crash due to the NULL pointer + dereference, causing a denial of service.</p> + <p>Mitigation:</p> + <ul> + <li>Use restrict noquery to limit addresses that can send mode 6 + queries.</li> + <li>Limit access to the private controlkey in ntp.keys.</li> + <li>Upgrade to 4.2.8p13, or later.</li> + </ul> + </blockquote> + </body> + </description> + <references> + <url>http://bugs.ntp.org/3565</url> + <url>http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-8936</url> + <url>https://nvd.nist.gov/vuln-metrics/cvss/v2-calculator?vector=(AV:N/AC:H/Au:M/C:N/I:N/A:C)</url> + <url>https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H</url> + <cvename>CVE-2019-8936</cvename> + </references> + <dates> + <discovery>2019-01-15</discovery> + <entry>2019-03-07</entry> + </dates> + </vuln> + <vuln vid="d193aa9f-3f8c-11e9-9a24-6805ca0b38e8"> <topic>rssh - multiple vulnerabilities</topic> <affects> |