CVE-2023-1999

Use after free in libwebp

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Existe un Use After Free/Double Free en libwebp. Un atacante puede usar la función ApplyFiltersAndEncode() y hacer un bucle para liberar best.bw y asignar best = puntero trial. El segundo bucle devolverá 0 debido a un error de memoria insuficiente en el codificador VP8, el puntero sigue asignado a trial y el AddressSanitizer intentará un doble free.

The Mozilla Foundation Security Advisory describes this flaw as:

A double-free in libwebp could have led to memory corruption and a potentially exploitable crash.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-04-12 CVE Reserved
2023-05-02 CVE Published
2024-07-22 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-415: Double Free
CWE-416: Use After Free

CAPEC

CAPEC-233: Privilege Escalation

References (4)

URL	Tag	Source
https://chromium.googlesource.com/webm/libwebp	Product
https://security.gentoo.org/glsa/202309-05

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-1999	2023-05-02
https://bugzilla.redhat.com/show_bug.cgi?id=2186102	2023-05-02

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Webmproject Search vendor "Webmproject"		Libwebp Search vendor "Webmproject" for product "Libwebp"				>= 0.4.2 < 1.3.1 Search vendor "Webmproject" for product "Libwebp" and version " >= 0.4.2 < 1.3.1"		-		Affected