What’s Vulnerable › Vulnerabilities

CVE-2019-11745

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-08 · updated 2026-06-17
• Weakness: CWE-787

Description

When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.10
• Debian Linux: 9.0
• Mozilla Firefox: before 71.0 — fixed in 71.0
• Mozilla Firefox ESR: before 68.3 — fixed in 68.3
• Mozilla Thunderbird: before 68.3.0 — fixed in 68.3.0
• openSUSE Leap: 15.1
• RedHat Enterprise Linux Server Aus: 6.6
• Siemens Ruggedcom Rox Mx5000 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1400 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1500 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1501 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1510 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1511 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx1512 Firmware: before 2.14.0 — fixed in 2.14.0
• Siemens Ruggedcom Rox Rx5000 Firmware: before 2.14.0 — fixed in 2.14.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 71.0; Mozilla Firefox ESR 68.3; Mozilla Thunderbird 68.3.0; Siemens Ruggedcom Rox Mx5000 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1400 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1500 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1501 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1510 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1511 Firmware 2.14.0; Siemens Ruggedcom Rox Rx1512 Firmware 2.14.0; Siemens Ruggedcom Rox Rx5000 Firmware 2.14.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html
• https://access.redhat.com/errata/RHSA-2020:0243
• https://access.redhat.com/errata/RHSA-2020:0466
• https://bugzilla.mozilla.org/show_bug.cgi?id=1586176
• https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf
• https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
• https://security.gentoo.org/glsa/202003-02
• https://security.gentoo.org/glsa/202003-10
• https://security.gentoo.org/glsa/202003-37
• https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04

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