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author | 2016-06-26 21:56:49 +0900 | |
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committer | 2016-06-26 21:56:49 +0900 | |
commit | 72956cf9a5460162cd56db5d95799ddafec57235 (patch) | |
tree | 2e7b04bb9c54b0ab5f04b17b9419e6f34f55338c /glsa-201606-12.xml | |
parent | Add GLSA 201606-11 (diff) | |
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Add GLSA 201606-12
Diffstat (limited to 'glsa-201606-12.xml')
-rw-r--r-- | glsa-201606-12.xml | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/glsa-201606-12.xml b/glsa-201606-12.xml new file mode 100644 index 00000000..385fd4f8 --- /dev/null +++ b/glsa-201606-12.xml @@ -0,0 +1,78 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> +<glsa id="201606-12"> + <title>libssh and libssh2: Multiple vulnerabilities</title> + <synopsis>Multiple vulnerabilities have been found in libssh and libssh2, the + worst of which allows remote attackers to cause Denial of Service. + </synopsis> + <product type="ebuild"></product> + <announced>June 26, 2016</announced> + <revised>June 26, 2016: 1</revised> + <bug>533366</bug> + <bug>575474</bug> + <bug>575484</bug> + <access>remote</access> + <affected> + <package name="net-libs/libssh" auto="yes" arch="*"> + <unaffected range="ge">0.7.3</unaffected> + <vulnerable range="lt">0.7.3</vulnerable> + </package> + <package name="net-libs/libssh2" auto="yes" arch="*"> + <unaffected range="ge">1.7.0</unaffected> + <vulnerable range="lt">1.7.0</vulnerable> + </package> + </affected> + <background> + <p>libssh is a mulitplatform C library implementing the SSHv2 and SSHv1 + protocol on client and server side. + </p> + </background> + <description> + <p>libssh and libssh2 both have a bits/bytes confusion bug and generate an + abnormaly short ephemeral secret for the diffie-hellman-group1 and + diffie-hellman-group14 key exchange methods. The resulting secret is 128 + bits long, instead of the recommended sizes of 1024 and 2048 bits + respectively. + </p> + + <p>Additionally, a double free on dangling pointers in initial key exchange + packets within libssh could leave dangling pointers in the session crypto + structures. It is possible to send a malicious kexinit package to + eventually cause a server to do a double-free before this fix. This could + be used for a Denial of Service attack. + </p> + </description> + <impact type="normal"> + <p>Remote attackers may gain access to confidential information due to the + short keysize generated by libssh and libssh2, or cause a Denial of + Service condition. + </p> + </impact> + <workaround> + <p>There is no known workaround at this time.</p> + </workaround> + <resolution> + <p>All libssh users should upgrade to the latest version:</p> + + <code> + # emerge --sync + # emerge --ask --oneshot --verbose ">=net-libs/libssh-0.7.3" + </code> + + <p>All libssh2 users should upgrade to the latest version:</p> + + <code> + # emerge --sync + # emerge --ask --oneshot --verbose ">=net-libs/libssh2-1.7.0" + </code> + </resolution> + <references> + <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-8132">CVE-2014-8132</uri> + <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-0739">CVE-2016-0739</uri> + <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-0787">CVE-2016-0787</uri> + </references> + <metadata tag="requester" timestamp="Tue, 30 Jun 2015 22:23:55 +0000"> + keytoaster + </metadata> + <metadata tag="submitter" timestamp="Sun, 26 Jun 2016 12:56:59 +0000">b-man</metadata> +</glsa> |