CVE-2020-6806 - Mozilla: BodyStream:: OnInputStreamReady was missing protections against state confusion

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HIGH

Mozilla: BodyStream:: OnInputStreamReady was missing protections against state confusion

Published Mar 25, 2020

8.8

HIGH

CVSS 3.1

EPSS 2.61%

Description

By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <74
- Version
  unspecified
  Status
  affected
  Constraints
  <ESR68.6
Vendor Mozilla Product Firefox ESR Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <68.6
Vendor Mozilla Product Thunderbird Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <68.6

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
unspecified	affected	<74
unspecified	affected	<ESR68.6

Mozilla

Firefox ESR

n/a

Version	Status	Constraints
unspecified	affected	<68.6

Mozilla

Thunderbird

n/a

Version	Status	Constraints
unspecified	affected	<68.6

Red Hat Enterprise Linux 6

firefox-0:68.6.0-1.el6_10

Fixed · RHSA-2020:0816
Red Hat Enterprise Linux 6

thunderbird-0:68.6.0-1.el6_10

Fixed · RHSA-2020:0914
Red Hat Enterprise Linux 7

firefox-0:68.6.0-1.el7_7

Fixed · RHSA-2020:0815
Red Hat Enterprise Linux 7

thunderbird-0:68.6.0-1.el7_7

Fixed · RHSA-2020:0905
Red Hat Enterprise Linux 8

firefox-0:68.6.0-1.el8_1

Fixed · RHSA-2020:0820
Red Hat Enterprise Linux 8

thunderbird-0:68.6.0-1.el8_1

Fixed · RHSA-2020:0919
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

firefox-0:68.6.0-1.el8_0

Fixed · RHSA-2020:0819
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

thunderbird-0:68.6.0-1.el8_0

Fixed · RHSA-2020:0918
Red Hat Enterprise Linux 5

firefox

Out of support scope
Red Hat Enterprise Linux 5

thunderbird

Out of support scope

Product	Package	State	Advisory
Red Hat Enterprise Linux 6	firefox-0:68.6.0-1.el6_10	Fixed	RHSA-2020:0816
Red Hat Enterprise Linux 6	thunderbird-0:68.6.0-1.el6_10	Fixed	RHSA-2020:0914
Red Hat Enterprise Linux 7	firefox-0:68.6.0-1.el7_7	Fixed	RHSA-2020:0815
Red Hat Enterprise Linux 7	thunderbird-0:68.6.0-1.el7_7	Fixed	RHSA-2020:0905
Red Hat Enterprise Linux 8	firefox-0:68.6.0-1.el8_1	Fixed	RHSA-2020:0820
Red Hat Enterprise Linux 8	thunderbird-0:68.6.0-1.el8_1	Fixed	RHSA-2020:0919
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions	firefox-0:68.6.0-1.el8_0	Fixed	RHSA-2020:0819
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions	thunderbird-0:68.6.0-1.el8_0	Fixed	RHSA-2020:0918
Red Hat Enterprise Linux 5	firefox	Out of support scope	n/a
Red Hat Enterprise Linux 5	thunderbird	Out of support scope	n/a

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-125

Out-of-bounds Read

References (12)

http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html
x_refsource_MISCThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2020-6806
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1612308
x_refsource_MISCIssue TrackingPermissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=1812200
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2020-6806
https://usn.ubuntu.com/4328-1/
vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/4335-1/
vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2020-6806
https://www.mozilla.org/en-US/security/advisories/mfsa2020-09/#CVE-2020-6806
https://www.mozilla.org/security/advisories/mfsa2020-08/
x_refsource_MISCVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-09/
x_refsource_MISCVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-10/
x_refsource_MISCVendor Advisory

Link	Providers	Tags
http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html		x_refsource_MISCThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2020-6806		Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1612308		x_refsource_MISCIssue TrackingPermissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=1812200		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2020-6806
https://usn.ubuntu.com/4328-1/		vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/4335-1/		vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2020-6806
https://www.mozilla.org/en-US/security/advisories/mfsa2020-09/#CVE-2020-6806
https://www.mozilla.org/security/advisories/mfsa2020-08/		x_refsource_MISCVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-09/		x_refsource_MISCVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-10/		x_refsource_MISCVendor Advisory