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hackeroneEcbftwH1:165154
HistorySep 02, 2016 - 12:15 a.m.

Internet Bug Bounty: Additional information for CVE-2016-5699

2016-09-0200:15:29
ecbftw
hackerone.com
18

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.002 Low

EPSS

Percentile

57.9%

I was not the first to report this issue, but the fix languished for quite some time, since no one realized quite how bad it was. I wasn’t aware of the original bug report and discovered the issue independently. I was the first to report the much more serious consequences of it. The vulnerability itself was technically public and fixed, and I waited 6 months to publish the more serious attack scenarios (when a CVE was finally publicly requested). My full description is here:
http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.002 Low

EPSS

Percentile

57.9%