Ubuntu Security Notice 3434-2 - USN-3434-1 fixed a vulnerability inA A Libidn. This update provides the corresponding update for Ubuntu 12.04 ESM. A It was discovered that Libidn incorrectly handled decoding certain A digits. A remote attacker could use this issue to cause Libidn to A crash, resulting in a denial of service, or possibly execute arbitrary A code. Various other issues were also addressed.
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Ubuntu Security Notice USN-3434-2
October 23, 2017
libidn vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Libidn could be made to crash or run programs if it processed specially
crafted input.
Software Description:
- libidn: implementation of IETF IDN specifications
Details:
USN-3434-1 fixed a vulnerability inA A Libidn. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
A It was discovered that Libidn incorrectly handled decoding certain
A digits. A remote attacker could use this issue to cause Libidn to
A crash, resulting in a denial of service, or possibly execute arbitrary
A code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
A libidn11A A A A A A A A A A A A A A A A A A A A A A A A 1.23-2ubuntu0.2
In general, a standard system update will make all the necessary
changes.
References:
A https://www.ubuntu.com/usn/usn-3434-2
A https://www.ubuntu.com/usn/usn-3434-1
A CVE-2017-14062