Vulnerability CVE-2017-7836

Vulnerability Name:

CVE-2017-7836 (CCN-134838)

Assigned:

2017-11-14

Published:

2017-11-14

Updated:

2019-10-03

Summary:

The "pingsender" executable used by the Firefox Health Report dynamically loads a system copy of libcurl, which an attacker could replace. This allows for privilege escalation as the replaced libcurl code will run with Firefox's privileges.
Note: This attack requires an attacker have local system access and only affects OS X and Linux. Windows systems are not affected. This vulnerability affects Firefox < 57.

CVSS v3 Severity:

7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

8.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.3 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-427

Vulnerability Consequences:

Gain Privileges

References:

Source: MITRE
Type: CNA
CVE-2017-7836

Source: BID
Type: Third Party Advisory, VDB Entry
101832

Source: CCN
Type: BID-101832
Mozilla Firefox Prior to 57 Multiple Security Vulnerabilities

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1039803

Source: CONFIRM
Type: Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1401339

Source: XF
Type: UNKNOWN
firefox-cve20177836-priv-esc(134838)

Source: CCN
Type: Mozilla Foundation Security Advisory 2017-24
Security vulnerabilities fixed in Firefox 57

Source: CONFIRM
Type: Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-24/

Vulnerable Configuration:

Configuration 1:

cpe:/a:mozilla:firefox:*:*:*:*:*:*:*:* (Version <= 56.0.2)

AND

cpe:/o:apple:mac_os_x:*:*:*:*:*:*:*:*

OR cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:mozilla:firefox:56.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:20177836	V	CVE-2017-7836	2022-06-30
oval:org.opensuse.security:def:111899	P	MozillaFirefox-92.0-1.2 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:105476	P	MozillaFirefox-92.0-1.2 on GA media (Moderate)	2021-10-01
oval:com.ubuntu.artful:def:20177836000	V	CVE-2017-7836 on Ubuntu 17.10 (artful) - medium.	2018-06-11
oval:com.ubuntu.bionic:def:20177836000	V	CVE-2017-7836 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-11
oval:com.ubuntu.bionic:def:201778360000000	V	CVE-2017-7836 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-11
oval:com.ubuntu.trusty:def:20177836000	V	CVE-2017-7836 on Ubuntu 14.04 LTS (trusty) - medium.	2018-06-11
oval:com.ubuntu.xenial:def:201778360000000	V	CVE-2017-7836 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-11
oval:com.ubuntu.xenial:def:20177836000	V	CVE-2017-7836 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-11

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