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Ubuntu Security Notice USN-3441-2
October 23, 2017
curl vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in curl.
Software Description:
– curl: HTTP, HTTPS, and FTP client and client libraries
Details:
USN-3441-1 fixed several vulnerabilities in curl. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Daniel Stenberg discovered that curl incorrectly handled large
floating point output. A remote attacker could use this issue to cause
curl to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-9586)
Even Rouault discovered that curl incorrectly handled large file names
when doing TFTP transfers. A remote attacker could use this issue to
cause curl to crash, resulting in a denial of service, or possibly
obtain sensitive memory contents. (CVE-2017-1000100)
Brian Carpenter and Yongji Ouyang discovered that curl incorrectly
handled numerical range globbing. A remote attacker could use this
issue to cause curl to crash, resulting in a denial of service, or
possibly obtain sensitive memory contents. (CVE-2017-1000101)
Max Dymond discovered that curl incorrectly handled FTP PWD responses.
A remote attacker could use this issue to cause curl to crash,
resulting in a denial of service. (CVE-2017-1000254)
Brian Carpenter discovered that curl incorrectly handled IMAP FETCH
response lines. A remote attacker could use this issue to cause curl
to crash, resulting in a denial of service, or possibly execute
arbitrary code.(CVE-2017-1000257)
Brian Carpenter discovered that curl incorrectly handled the –write-
out command line option. A local attacker could possibly use this
issue to obtain sensitive memory contents. (CVE-2017-7407)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
curl 7.22.0-3ubuntu4.18
libcurl3 7.22.0-3ubuntu4.18
libcurl3-gnutls 7.22.0-3ubuntu4.18
libcurl3-nss 7.22.0-3ubuntu4.18
In general, a standard system update will make all the necessary
changes.
References:
https://www.ubuntu.com/usn/usn-3441-2
https://www.ubuntu.com/usn/usn-3441-1
CVE-2016-9586, CVE-2017-1000100, CVE-2017-1000254, CVE-2017-1000257,
CVE-2017-7407
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