Category Archives: Security

Security

USN-3533-1: Transmission vulnerability

Ubuntu Security Notice USN-3533-1

16th January, 2018

transmission vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Transmission could be made to run arbitraty code.

Software description

  • transmission
    – lightweight BitTorrent client

Details

It was discovered that Transmission incorrectly handled certain POST requests to
the RPC server and allowed DNS rebinding attack. An attacker could possibly use this
issue to execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 17.10:
transmission

2.92-2ubuntu3.1
Ubuntu 16.04 LTS:
transmission

2.84-3ubuntu3.1
Ubuntu 14.04 LTS:
transmission

2.82-1.1ubuntu3.2

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

CVE-2018-5702

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USN-3535-2: Bind vulnerability

Ubuntu Security Notice USN-3535-2

17th January, 2018

bind9 vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 12.04 LTS

Summary

Bind could be made to crash if it received specially crafted network
traffic.

Software description

  • bind9
    – Internet Domain Name Server

Details

USN-3535-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Jayachandran Palanisamy discovered that the Bind resolver incorrectly
handled fetch cleanup sequencing. A remote attacker could possibly use this
issue to cause Bind to crash, resulting in a denial of service.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 12.04 LTS:
bind9

1:9.8.1.dfsg.P1-4ubuntu0.24

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

CVE-2017-3145

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USN-3536-1: GNU C Library vulnerability

Ubuntu Security Notice USN-3536-1

17th January, 2018

eglibc vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 12.04 LTS

Summary

The GNU C library could be made to run programs as an administrator.

Software description

  • eglibc
    – GNU C Library

Details

It was discovered that the GNU C library did not properly handle all of
the possible return values from the kernel getcwd(2) syscall. A local
attacker could potentially exploit this to execute arbitrary code in setuid
programs and gain administrative privileges. (CVE-2018-1000001)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 12.04 LTS:
libc6

2.15-0ubuntu10.21

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2018-1000001

Read More