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hackeroneAlyssa_herreraH1:315256
HistoryFeb 12, 2018 - 4:36 p.m.

Valve: ImageMagick GIF coder vulnerability leading to memory disclosure

2018-02-1216:36:24
alyssa_herrera
hackerone.com
151

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.015 Low

EPSS

Percentile

85.3%

Due to CVE-2017-15277, portions of server memory on some steamcommunity web servers could be leaked via image updates. An attacker would not be able to control what memory would be returned, but system information could be obtained.
I was able to arbitrarily disclose server memory on steamcommunity.com due to CVE-2017-15277.

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.015 Low

EPSS

Percentile

85.3%