Lucene search

MozillaCVE-2017-7805

HistoryJun 11, 2018 - 9:29 p.m.

CVE-2017-7805

2018-06-1121:29:10

CWE-416

mozilla

web.nvd.nist.gov

335

cve-2017-7805

tls 1.2

handshake hashes

use-after-free

exploit

crash

firefox

thunderbird

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

Confidence

High

EPSS

0.01

Percentile

83.7%

JSON

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.

Affected configurations

Nvd

Vulners

Node

mozillafirefoxMatch56.0

mozillafirefox_esrMatch52.4.0

mozillathunderbirdMatch52.4.0

Node

debiandebian_linuxMatch7.0

debiandebian_linuxMatch8.0

debiandebian_linuxMatch9.0

VendorProductVersionCPE
mozillafirefox56.0cpe:2.3:a:mozilla:firefox:56.0:*:*:*:*:*:*:*
mozillafirefox_esr52.4.0cpe:2.3:a:mozilla:firefox_esr:52.4.0:*:*:*:*:*:*:*
mozillathunderbird52.4.0cpe:2.3:a:mozilla:thunderbird:52.4.0:*:*:*:*:*:*:*
debiandebian_linux7.0cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debiandebian_linux8.0cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debiandebian_linux9.0cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	56.0	cpe:2.3:a:mozilla:firefox:56.0:::::::*
mozilla	firefox_esr	52.4.0	cpe:2.3:a:mozilla:firefox_esr:52.4.0:::::::*
mozilla	thunderbird	52.4.0	cpe:2.3:a:mozilla:thunderbird:52.4.0:::::::*
debian	debian_linux	7.0	cpe:2.3:o:debian:debian_linux:7.0:::::::*
debian	debian_linux	8.0	cpe:2.3:o:debian:debian_linux:8.0:::::::*
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*

CNA Affected

[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "56",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Firefox ESR",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "52.4",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "52.4",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]