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GitHub_MCVE-2019-16782

HistoryDec 18, 2019 - 8:15 p.m.

CVE-2019-16782

2019-12-1820:15:16

CWE-203

CWE-208

GitHub_M

web.nvd.nist.gov

277

cve-2019-16782

information leak

session hijack

vulnerability

rubygem rack

patch

timing attack

database indexing

CVSS2

4.3

Attack Vector

NETWORK

Attack 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

CVSS3

6.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.2

Confidence

High

EPSS

0.002

Percentile

65.0%

JSON

There’s a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12 and 2.0.8. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session. The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.

Affected configurations

Nvd

Node

rack_projectrackRange<1.6.12ruby

rack_projectrackRange2.0.0–2.0.8ruby

Node

fedoraprojectfedoraMatch31

Node

opensuseleapMatch15.1

VendorProductVersionCPE
rack_projectrack*cpe:2.3:a:rack_project:rack:*:*:*:*:*:ruby:*:*
fedoraprojectfedora31cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
opensuseleap15.1cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
rack_project	rack	*	cpe:2.3:a:rack_project:rack::::::ruby::*
fedoraproject	fedora	31	cpe:2.3:o:fedoraproject:fedora:31:::::::*
opensuse	leap	15.1	cpe:2.3:o:opensuse:leap:15.1:::::::*

CNA Affected

[
  {
    "product": "rack",
    "vendor": "rack",
    "versions": [
      {
        "status": "affected",
        "version": "before 1.6.12 or 2.0.8"
      }
    ]
  }
]