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Vulnerability of Exim: memory corruption via Stack Clash

Synthesis of the vulnerability 

An attacker can generate a memory corruption via Stack Clash of Exim (with the -p option to extend the allocated memory), in order to trigger a denial of service, and possibly to run code.
Impacted products: Debian, Exim, Fedora, Junos Space, openSUSE Leap, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 20/06/2017.
Revision date: 20/06/2017.
Références of this threat: CERTFR-2017-AVI-365, CVE-2017-1000369, DLA-1001-1, DSA-3888-1, FEDORA-2017-f5177f3a16, JSA10824, JSA10826, openSUSE-SU-2017:1625-1, openSUSE-SU-2017:2289-1, openSUSE-SU-2021:0677-1, openSUSE-SU-2021:0753-1, openSUSE-SU-2021:0754-1, USN-3322-1, VIGILANCE-VUL-23007.

Description of the vulnerability 

An attacker can generate a memory corruption via Stack Clash of Exim (with the -p option to extend the allocated memory), in order to trigger a denial of service, and possibly to run code.
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This cybersecurity announce impacts software or systems such as Debian, Exim, Fedora, Junos Space, openSUSE Leap, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this threat alert is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer weakness alert.

Solutions for this threat 

Exim: version 4.90.
The version 4.90 is fixed:
  ftp://ftp.exim.org/pub/exim/exim4/

Exim: patch for Stack Clash.
A patch is available:
  https://github.com/Exim/exim/commit/65e061b76867a9ea7aeeb535341b790b90ae6c21

Debian: new exim4 packages.
New packages are available:
  Debian 7: exim4 4.80-7+deb7u5
  Debian 8: exim4 4.84.2-2+deb8u4
  Debian 9: exim4 4.89-2+deb9u1

Fedora 26: new exim packages.
New packages are available:
  Fedora 26: exim 4.89-5.fc26

Juniper Junos Space: solution.
The solution is indicated in information sources.

openSUSE Leap 15.2: new exim packages.
New packages are available:
  openSUSE Leap 15.2: exim 4.94.2-lp152.8.3.1

openSUSE Leap 42.2: new exim packages.
New packages are available:
  openSUSE Leap 42.2: exim 4.86.2-10.3.1

openSUSE Leap: new exim packages.
New packages are available:
  openSUSE Leap 42.2: exim 4.86.2-10.6.1
  openSUSE Leap 42.3: exim 4.86.2-14.1

SUSE LE 15 SP1: new exim packages.
New packages are available:
  SUSE LE 15 SP1: exim 4.94.2-bp151.2.4.1

SUSE LE 15 SP2: new exim packages.
New packages are available:
  SUSE LE 15 SP2: exim 4.94.2-bp152.6.4.1

Ubuntu: new exim4 packages.
New packages are available:
  Ubuntu 17.04: exim4 4.88-5ubuntu1.1
  Ubuntu 16.10: exim4 4.87-3ubuntu1.2
  Ubuntu 16.04 LTS: exim4 4.86.2-2ubuntu2.2
  Ubuntu 14.04 LTS: exim4 4.82-3ubuntu2.3
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