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
firefox Launchpad, Ubuntu, Debian	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)
	trusty	Does not exist
	upstream	Released (71.0)
	xenial	Released (71.0+build5-0ubuntu0.16.04.1)
nss Launchpad, Ubuntu, Debian	bionic	Released (2:3.35-2ubuntu2.5)
	disco	Released (2:3.42-1ubuntu2.3)
	eoan	Released (2:3.45-1ubuntu2.1)
	trusty	Released (2:3.28.4-0ubuntu0.14.04.5+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (3.44.3,3.47.1)
	xenial	Released (2:3.28.4-0ubuntu0.16.04.8)
	Patches: upstream: https://hg.mozilla.org/projects/nss/rev/1e22a0c93afe9f46545560c86caedef9dab6cfda upstream: https://hg.mozilla.org/projects/nss/rev/60bca7c6dc6dc44579b9b3e0fb62ca3b82d92eec upstream: https://hg.mozilla.org/projects/nss/rev/4c20de402b3901df0cde590a46be2ba49adc028e
thunderbird Launchpad, Ubuntu, Debian	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)
	trusty	Does not exist
	upstream	Released (68.3)
	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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