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cybersecurity bulletin CVE-2019-15903

libexpat: out-of-bounds memory reading via XML_GetCurrentLineNumber

Synthesis of the vulnerability

An attacker can force a read at an invalid address via XML_GetCurrentLineNumber() of libexpat, in order to trigger a denial of service, or to obtain sensitive information.
Severity of this computer vulnerability: 2/4.
Creation date: 09/09/2019.
Références of this announce: CERTFR-2019-AVI-535, CVE-2019-15903, DLA-1912-1, DLA-1987-1, DSA-4530-1, DSA-4549-1, FEDORA-2019-672ae0f060, FEDORA-2019-9505c6b555, FEDORA-2019-9b4ebc2973, MFSA-2019-33, MFSA-2019-34, MFSA-2019-35, openSUSE-SU-2019:2204-1, openSUSE-SU-2019:2205-1, openSUSE-SU-2019:2420-1, openSUSE-SU-2019:2424-1, openSUSE-SU-2019:2425-1, openSUSE-SU-2019:2447-1, openSUSE-SU-2019:2451-1, openSUSE-SU-2019:2452-1, openSUSE-SU-2019:2459-1, openSUSE-SU-2019:2464-1, RHSA-2019:3210-01, RHSA-2019:3237-01, RHSA-2019:3756-01, SSA:2019-259-01, SSA:2019-293-01, SSA:2019-295-01, SUSE-SU-2019:2429-1, SUSE-SU-2019:2440-1, SUSE-SU-2019:2871-1, SUSE-SU-2019:2872-1, SUSE-SU-2019:2912-1, USN-4132-1, USN-4132-2, USN-4165-1, USN-4165-2, VIGILANCE-VUL-30268.
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Description of the vulnerability

An attacker can force a read at an invalid address via XML_GetCurrentLineNumber() of libexpat, in order to trigger a denial of service, or to obtain sensitive information.
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This cybersecurity weakness impacts software or systems such as Debian, Fedora, Firefox, Thunderbird, OpenBSD, openSUSE Leap, Python, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security vulnerability is medium.

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

An attacker with a expert ability can exploit this vulnerability bulletin.

Solutions for this threat

Debian 10: new firefox-esr packages.
New packages are available:
  Debian 10: firefox-esr 68.2.0esr-1~deb10u1

Debian 8: new firefox-esr packages.
New packages are available:
  Debian 8: firefox-esr 68.2.0esr-1~deb8u1

Debian: new expat packages.
New packages are available:
  Debian 8: expat 2.1.0-6+deb8u6
  Debian 9: expat 2.2.0-2+deb9u3
  Debian 10: expat 2.2.6-2+deb10u1

Fedora 31: new thunderbird packages.
New packages are available:
  Fedora 31: thunderbird 68.2.0-1.fc31

Fedora: new expat packages.
New packages are available:
  Fedora 29: expat 2.2.8-1.fc29
  Fedora 30: expat 2.2.8-1.fc30

Firefox: version 68.2.
The version 68.2 is fixed:
  https://www.mozilla.org/en-US/firefox/

Firefox: version 70.
The version 70 is fixed:
  https://www.mozilla.org/en-US/firefox/

OpenBSD: patch for expat.
A patch is indicated in information sources.

openSUSE Leap 15: new chromium packages.
New packages are available:
  openSUSE Leap 15.0: chromium 78.0.3904.70-lp150.248.2
  openSUSE Leap 15.1: chromium 78.0.3904.70-lp151.2.39.1
  SUSE LE 15 RTM: chromium 78.0.3904.70-bp150.240.1
  SUSE LE 15 SP1: chromium 78.0.3904.70-bp151.3.21.1

openSUSE Leap 15: new expat packages.
New packages are available:
  openSUSE Leap 15.0: expat 2.2.5-lp150.2.6.1
  openSUSE Leap 15.1: expat 2.2.5-lp151.3.6.1

openSUSE Leap 15: new MozillaFirefox packages.
New packages are available:
  openSUSE Leap 15.0: MozillaFirefox 68.2.0-lp150.3.71.1
  openSUSE Leap 15.1: MozillaFirefox 68.2.0-lp151.2.18.2

openSUSE Leap 15: new MozillaThunderbird packages.
New packages are available:
  openSUSE Leap 15.0: MozillaThunderbird 68.2.1-lp150.3.54.1
  openSUSE Leap 15.1: MozillaThunderbird 68.2.1-lp151.2.16.1

Python: version 3.5.8.
The version 3.5.8 is fixed:
  https://www.python.org/downloads/

RHEL 6: new thunderbird packages.
New packages are available:
  RHEL 6: thunderbird 68.2.0-2.el6_10

RHEL 7: new thunderbird packages.
New packages are available:
  RHEL 7: thunderbird 68.2.0-1.el7_7

RHEL 8: new thunderbird packages.
New packages are available:
  RHEL 8: thunderbird 68.2.0-1.el8_0

Slackware 14: new expat packages.
New packages are available:
  Slackware 14.0: expat 2.2.8-*-1_slack14.0
  Slackware 14.1: expat 2.2.8-*-1_slack14.1
  Slackware 14.2: expat 2.2.8-*-1_slack14.2

Slackware: new mozilla-firefox packages.
New packages are available:
  Slackware 14.2: mozilla-firefox 68.2.0esr-*-1_slack14.2

Slackware: new python packages.
New packages are available:
  Slackware 14.0: python 2.7.17-*-1_slack14.0
  Slackware 14.1: python 2.7.17-*-1_slack14.1
  Slackware 14.2: python 2.7.17-*-1_slack14.2

SUSE LE 12: new chromium packages.
New packages are available:
  SUSE LE 12 RTM-SP5: chromium 78.0.3904.87-10.1

SUSE LE 12: new MozillaFirefox packages (31/10/2019).
New packages are available:
  SUSE LE 12 SP1: MozillaFirefox 68.2.0-109.95.2
  SUSE LE 12 SP2: MozillaFirefox 68.2.0-109.95.2
  SUSE LE 12 SP3: MozillaFirefox 68.2.0-109.95.2
  SUSE LE 12 SP4: MozillaFirefox 68.2.0-109.95.2
  SUSE LE 12 SP5: MozillaFirefox 68.2.0-109.95.2

SUSE LE 15: new MozillaFirefox packages.
New packages are available:
  SUSE LE 15 RTM: MozillaFirefox 68.2.0-3.59.1
  SUSE LE 15 SP1: MozillaFirefox 68.2.0-3.59.1

SUSE LE 15: new MozillaThunderbird packages.
New packages are available:
  SUSE LE 15 RTM: MozillaThunderbird 68.2.1-3.58.1
  SUSE LE 15 SP1: MozillaThunderbird 68.2.1-3.58.1

SUSE LE: new expat packages.
New packages are available:
  SUSE LE 15 SP1: expat 2.2.5-3.6.1
  SUSE LE 15 RTM: expat 2.2.5-3.6.1
  SUSE LE 12 SP4: expat 2.1.0-21.9.1

Thunderbird: version 68.2.
The version 68.2 is fixed:
  https://www.mozilla.org/

Ubuntu: new firefox packages.
New packages are available:
  Ubuntu 19.10: firefox 70.0.1+build1-0ubuntu0.19.10.1
  Ubuntu 19.04: firefox 70.0.1+build1-0ubuntu0.19.04.1
  Ubuntu 18.04 LTS: firefox 70.0.1+build1-0ubuntu0.18.04.1
  Ubuntu 16.04 LTS: firefox 70.0.1+build1-0ubuntu0.16.04.1

Ubuntu: new libexpat1 packages.
New packages are available:
  Ubuntu 19.04: libexpat1 2.2.6-1ubuntu0.19.5
  Ubuntu 18.04 LTS: libexpat1 2.2.5-3ubuntu0.2
  Ubuntu 16.04 LTS: libexpat1 2.1.0-7ubuntu0.16.04.5
  Ubuntu 14.04 ESM: libexpat1 2.1.0-4ubuntu1.4+esm2
  Ubuntu 12.04 ESM: libexpat1 2.0.1-7.2ubuntu1.7
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