CVE-2023-1999

Description

There exists a use after free/double free in libwebp. An attacker can use the ApplyFiltersAndEncode() function and loop through to free best.bw and assign best = trial pointer. The second loop will then return 0 because of an Out of memory error in VP8 encoder, the pointer is still assigned to trial and the AddressSanitizer will attempt a double free.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libwebp	25.10 questing	Fixed 1.2.4-0.1ubuntu1
	25.04 plucky	Fixed 1.2.4-0.1ubuntu1
	24.10 oracular	Fixed 1.2.4-0.1ubuntu1
	24.04 LTS noble	Fixed 1.2.4-0.1ubuntu1
	23.10 mantic	Fixed 1.2.4-0.1ubuntu1
	23.04 lunar	Fixed 1.2.4-0.1ubuntu0.23.04.1
	22.10 kinetic	Fixed 1.2.2-2ubuntu0.22.10.1
	22.04 LTS jammy	Fixed 1.2.2-2ubuntu0.22.04.1
	20.04 LTS focal	Fixed 0.6.1-2ubuntu0.20.04.2
	18.04 LTS bionic	Fixed 0.6.1-2ubuntu0.18.04.2
	16.04 LTS xenial	Fixed 0.4.4-1ubuntu0.1~esm2
	14.04 LTS trusty	Needs evaluation
firefox	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support
mozjs38	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
mozjs52	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored
	18.04 LTS bionic	Ignored
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
mozjs68	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
mozjs78	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Ignored
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
mozjs91	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Ignored
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
thunderbird	25.10 questing	Ignored bundled deps handled by new versions
	25.04 plucky	Ignored bundled deps handled by new versions
	24.10 oracular	Ignored end of life, was ignored [bundled deps handled by new versions]
	24.04 LTS noble	Ignored bundled deps handled by new versions
	23.10 mantic	Ignored end of life, was ignored [bundled deps handled by new versions]
	23.04 lunar	Ignored end of life, was ignored [bundled deps handled by new versions]
	22.10 kinetic	Ignored end of life, was needed
	22.04 LTS jammy	Ignored bundled deps handled by new versions
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored end of standard support, was needed
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

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Notes

tyhicks

mozjs contains a copy of the SpiderMonkey JavaScript engine

mdeslaur

starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libwebp	Upstream: a486d80
firefox	Upstream: https://hg.mozilla.org/releases/mozilla-esr102/rev/53b805c752ff23080e100eda2b3b4280d4370b2e

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Cvss 3 Severity Score