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ubuntucveUbuntu.comUB:CVE-2017-7468
HistoryApr 19, 2017 - 12:00 a.m.

CVE-2017-7468

2017-04-1900:00:00
ubuntu.com
ubuntu.com
13

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

0.005 Low

EPSS

Percentile

75.4%

In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt
to resume a TLS session even if the client certificate had changed. That is
unacceptable since a server by specification is allowed to skip the client
certificate check on resume, and may instead use the old identity which was
established by the previous certificate (or no certificate). libcurl
supports by default the use of TLS session id/ticket to resume previous TLS
sessions to speed up subsequent TLS handshakes. They are used when for any
reason an existing TLS connection couldn’t be kept alive to make the next
handshake faster. This flaw is a regression and identical to CVE-2016-5419
reported on August 3rd 2016, but affecting a different version range.

Bugs

Notes

Author Note
sbeattie reported upstream mitigation: Set CURLOPT_SSL_SESSIONID_CACHE to 0L when using client certificates
OSVersionArchitecturePackageVersionFilename
ubuntu17.04noarchcurl<Β 7.52.1-4ubuntu1.1UNKNOWN

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

0.005 Low

EPSS

Percentile

75.4%