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hackeroneChamalH1:510336
HistoryMar 15, 2019 - 2:21 p.m.

Internet Bug Bounty: Uninitialized read in exif_process_IFD_in_TIFF

2019-03-1514:21:28
chamal
hackerone.com
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:3.1/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

0.022 Low

EPSS

Percentile

87.8%

This bug can be reproduced only in 32 bit PHP builds.
This bug is present in exif_process_IFD_in_TIFF method of ext/exif/exif.c file.

Detailed description and steps to reproduce for this bug is present in bug report submitted to php.net.
Bug Report : https://bugs.php.net/bug.php?id=77509
PHP version : 7.1.26
CVE-ID : 2019-9641

Impact

Uninitialized variables may leak data from memory.

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:3.1/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

0.022 Low

EPSS

Percentile

87.8%