Vulnerability Name:

CVE-2017-7781 (CCN-130176)

Assigned:2017-08-08
Published:2017-08-08
Updated:2019-10-03
Summary:An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result "POINT_AT_INFINITY" when it should not. A man-in-the-middle attacker could use this to interfere with a connection, resulting in an attacked party computing an incorrect shared secret. This vulnerability affects Firefox < 55.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2017-7781

Source: BID
Type: Third Party Advisory, VDB Entry
100383

Source: CCN
Type: BID-100383
Mozilla Firefox CVE-2017-7781 Man in the Middle Security Bypass Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1039124

Source: CONFIRM
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1352039

Source: XF
Type: UNKNOWN
firefox-cve20177781-sec-bypass(130176)

Source: CCN
Type: IBM Security Bulletin 6551876 (Cloud Pak for Security)
Cloud Pak for Security uses packages that are vulnerable to multiple CVEs

Source: CCN
Type: Mozilla Foundation Security Advisory 2017-18
Security vulnerabilities fixed in Firefox 55

Source: CONFIRM
Type: Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-18/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:firefox:*:*:*:*:*:*:*:* (Version < 55.0)

    • Configuration CCN 1:
  • cpe:/a:ibm:cloud_pak_for_security:1.7.2.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20177781
    V
    		CVE-2017-7781
    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.bionic:def:201777810000000
    V
    		CVE-2017-7781 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-11
    oval:com.ubuntu.artful:def:20177781000
    V
    		CVE-2017-7781 on Ubuntu 17.10 (artful) - medium.
    2018-06-11
    oval:com.ubuntu.xenial:def:20177781000
    V
    		CVE-2017-7781 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-11
    oval:com.ubuntu.xenial:def:201777810000000
    V
    		CVE-2017-7781 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-06-11
    oval:com.ubuntu.bionic:def:20177781000
    V
    		CVE-2017-7781 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-06-11
    oval:com.ubuntu.disco:def:201777810000000
    V
    		CVE-2017-7781 on Ubuntu 19.04 (disco) - medium.
    2018-06-11
    oval:com.ubuntu.cosmic:def:20177781000
    V
    		CVE-2017-7781 on Ubuntu 18.10 (cosmic) - medium.
    2018-06-11
    oval:com.ubuntu.cosmic:def:201777810000000
    V
    		CVE-2017-7781 on Ubuntu 18.10 (cosmic) - medium.
    2018-06-11
    oval:com.ubuntu.trusty:def:20177781000
    V
    		CVE-2017-7781 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-06-11
    BACK
    mozilla firefox *
    ibm cloud pak for security 1.7.2.0