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K
zdiNguyen Hoang Thach (https://twitter.com/hi_im_d4rkn3ss) and Billy Jheng Bing-Jhong (https://twitter.com/st424204)ZDI-22-245
HistoryFeb 01, 2022 - 12:00 a.m.

(Pwn2Own) Samba fruit_pread Out-Of-Bounds Read Information Disclosure Vulnerability

2022-02-0100:00:00
Nguyen Hoang Thach (https://twitter.com/hi_im_d4rkn3ss) and Billy Jheng Bing-Jhong (https://twitter.com/st424204)
www.zerodayinitiative.com
15

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Samba. Authentication is not required to exploit this vulnerability. The specific flaw exists within the fruit_pread method. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C