National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

    Vulnerabilities Detail

CVE-2017-7805 Detail

Current Description

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Source:  MITRE
Description Last Modified:  06/11/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/101059 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039465 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:2832 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1377618 Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html Third Party Advisory
https://security.gentoo.org/glsa/201803-14 Third Party Advisory
https://www.debian.org/security/2017/dsa-3987 Third Party Advisory
https://www.debian.org/security/2017/dsa-3998 Third Party Advisory
https://www.debian.org/security/2017/dsa-4014 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-21/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-22/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-23/ Vendor Advisory

Technical Details

Vulnerability Type (View All)

Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7805
NVD Published Date:
06/11/2018
NVD Last Modified:
10/16/2018