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hackeroneHaquamanH1:476168
HistoryJan 07, 2019 - 8:15 p.m.

Internet Bug Bounty: Heap overflow in utf32be_mbc_to_code

2019-01-0720:15:56
haquaman
hackerone.com
$1500
37

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

68.8%

https://bugs.php.net/bug.php?id=77418

Buffer overflow in mbc_to_code functions for UTF32BE, UTF32LE, UTF16BE, and UTF16LE due to incorrect length assumptions of a buffer. Provided a patch that was adapted to check the length of the buffer prior to using it.

Impact

Memory leakage and/or corruption

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

68.8%