CVE and update status of the FreeBSD ports tree4,526 unaddressed CVEs in 616 portsAll times are CET

CVE details

CVE-2019-1547

Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Score
4.7 medium
Published
2019-09-10
Links
NVD · cve.org

Affected ports (2)

PortPackageVersionStatusMaintainer
security/linux-c7-openssl-devellinux-c7-openssl-devel1.0.2k_2unaddressedemulation@FreeBSD.org
security/openssl-unsafeopenssl-unsafe1.0.2.20170706unaddressedbrnrd@FreeBSD.org

VuXML

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>linux-c7-openssl-devel</name>
	<range><lt>FIXME</lt></range>
      </package>
      <package>
	<name>openssl-unsafe</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Normally in OpenSSL EC groups always have a co-factor present and this
	is used in side channel resistant code paths. However, in some cases,
	it is possible to construct a group using explicit parameters (instead
	of using a named curve). In those cases it is possible that such a
	group does not have the cofactor present. This can occur even where
	all the parameters match a known named curve. If such a curve is used
	then OpenSSL falls back to non-side channel resistant code paths which
	may result in full key recovery during an ECDSA signature operation.
	In order to be vulnerable an attacker would have to have the ability
	to time the creation of a large number of signatures where explicit
	parameters with no co-factor present are in use by an application
	using libcrypto. For the avoidance of doubt libssl is not vulnerable
	because explicit parameters are never used. Fixed in OpenSSL 1.1.1d
	(Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected
	1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2019-1547</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2019-1547</url>
    </references>
    <dates>
      <discovery>2019-09-10</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>