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ubuntucveUbuntu.comUB:CVE-2022-38153
HistoryAug 31, 2022 - 12:00 a.m.

CVE-2022-38153

2022-08-3100:00:00
ubuntu.com
ubuntu.com
14
wolfssl
vulnerability
exploitable

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.003

Percentile

71.4%

An issue was discovered in wolfSSL before 5.5.0 (when
–enable-session-ticket is used); however, only version 5.3.0 is
exploitable. Man-in-the-middle attackers or a malicious server can crash
TLS 1.2 clients during a handshake. If an attacker injects a large ticket
(more than 256 bytes) into a NewSessionTicket message in a TLS 1.2
handshake, and the client has a non-empty session cache, the session cache
frees a pointer that points to unallocated memory, causing the client to
crash with a “free(): invalid pointer” message. NOTE: It is likely that
this is also exploitable during TLS 1.3 handshakes between a client and a
malicious server. With TLS 1.3, it is not possible to exploit this as a
man-in-the-middle.

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.003

Percentile

71.4%

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