CVE-2019-11745

Published: 25 November 2019

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.

Priority

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
nss Launchpad, Ubuntu, Debian	upstream	Released (3.44.3,3.47.1)
	trusty	Released (2:3.28.4-0ubuntu0.14.04.5+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	xenial	Released (2:3.28.4-0ubuntu0.16.04.8)
	bionic	Released (2:3.35-2ubuntu2.5)
	disco	Released (2:3.42-1ubuntu2.3)
	eoan	Released (2:3.45-1ubuntu2.1)
	Patches: upstream: https://hg.mozilla.org/projects/nss/rev/1e22a0c93afe9f46545560c86caedef9dab6cfda (master) upstream: https://hg.mozilla.org/projects/nss/rev/60bca7c6dc6dc44579b9b3e0fb62ca3b82d92eec (3.44) upstream: https://hg.mozilla.org/projects/nss/rev/4c20de402b3901df0cde590a46be2ba49adc028e (3.47)
firefox Launchpad, Ubuntu, Debian	upstream	Released (71.0)
	trusty	Does not exist
	xenial	Released (71.0+build5-0ubuntu0.16.04.1)
	bionic	Released (71.0+build5-0ubuntu0.18.04.1)
	disco	Released (71.0+build5-0ubuntu0.19.04.1)
	eoan	Released (71.0+build5-0ubuntu0.19.10.1)
thunderbird Launchpad, Ubuntu, Debian	upstream	Released (68.3)
	trusty	Does not exist
	bionic	Released (1:68.4.1+build1-0ubuntu0.18.04.1)
	disco	Ignored (end of life)
	eoan	Released (1:68.4.1+build1-0ubuntu0.19.10.1)
	xenial	Released (1:68.7.0+build1-0ubuntu0.16.04.2)

Severity score breakdown

Parameter	Value
Base score	8.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=1586176 (not public)

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