USN-3434-1: Libidn vulnerability
Ubuntu Security Notice USN-3434-1
2nd October, 2017
libidn vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
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
It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn to crash, resulting
in a denial of service, or possibly execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.04:
-
libidn11
1.33-1ubuntu0.1
- Ubuntu 16.04 LTS:
-
libidn11
1.32-3ubuntu1.2
- Ubuntu 14.04 LTS:
-
libidn11
1.28-1ubuntu2.2
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-3434-1: Libidn vulnerability
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