CVE-2019-20503: Medium severity Apple tvOS vulnerability

Published Mar 6, 2020
·
Updated

Last updated 24 July 2024

Other sources

The inputs to sctploadaddressesfrominit are verified by sctparethereunrecognizedparameters; however, the two functions handled parameter bounds differently, resulting in out of bounds reads when parameters are partially outside a chunk.

External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-09/#CVE-2019-20503

— Red Hat

The inputs to sctploadaddressesfrominit are verified by sctparethereunrecognizedparameters; however, the two functions handled parameter bounds differently, resulting in out of bounds reads when parameters are partially outside a chunk.

— Mozilla

usrsctp before 2019-12-20 has out-of-bounds reads in sctploadaddressesfrominit.

— Launchpad

WebRTC. An access issue was addressed with improved memory management.

Credit

natashenka(Google Project Zero)

Affected Software

24 affected componentsFixes available
redhat/firefox<68.6
68.6
redhat/thunderbird<68.6
68.6
redhat/chromium-browser<80.0.3987.149
80.0.3987.149
Apple tvOS<13.4.5
13.4.5
Apple WatchOS<6.2.5
6.2.5
Mozilla Thunderbird<68.6
68.6
Usrsctp Project Usrsctp<2019-12-20
Mozilla Firefox<74
74
Mozilla Firefox ESR<68.6
68.6
Apple Safari<13.1.1
13.1.1
Usrsctp Project Usrsctp<0.9.4.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Apple iOS<13.5
13.5
Apple iPadOS<13.5
13.5
debian/chromium
120.0.6099.224-1~deb11u1134.0.6998.35-1~deb12u1136.0.7103.59-2~deb12u2135.0.7049.95-1136.0.7103.59-2
debian/firefox
138.0.1-1
debian/firefox-esr
115.14.0esr-1~deb11u1128.9.0esr-1~deb11u1128.8.0esr-1~deb12u1128.10.0esr-1~deb12u1128.9.0esr-2128.10.0esr-1
debian/libusrsctp
0.9.3.0+20201102-20.9.5.0-2
debian/thunderbird
1:115.12.0-1~deb11u11:128.10.0esr-1~deb11u11:128.8.0esr-1~deb12u11:128.10.0esr-1~deb12u11:128.9.0esr-11:128.10.0esr-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/firefox to a version that resolves this vulnerability.

    Fixed in 68.6
  2. Upgrade

    Upgrade redhat/thunderbird to a version that resolves this vulnerability.

    Fixed in 68.6
  3. Upgrade

    Upgrade redhat/chromium-browser to a version that resolves this vulnerability.

    Fixed in 80.0.3987.149
  4. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 13.4.5
  5. Upgrade

    Upgrade Apple iOS, iPadOS, and watchOS to a version that resolves this vulnerability.

    Fixed in 6.2.5
  6. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 68.6
  7. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 74
  8. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 68.6
  9. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 13.1.1
  10. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 13.5
  11. Upgrade

    Upgrade Apple iOS, iPadOS, and macOS to a version that resolves this vulnerability.

    Fixed in 13.5
  12. Upgrade

    Upgrade debian/chromium to a version that resolves this vulnerability.

    Fixed in 120.0.6099.224-1~deb11u1Fixed in 134.0.6998.35-1~deb12u1Fixed in 136.0.7103.59-2~deb12u2Fixed in 135.0.7049.95-1Fixed in 136.0.7103.59-2
  13. Upgrade

    Upgrade debian/firefox to a version that resolves this vulnerability.

    Fixed in 138.0.1-1
  14. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 115.14.0esr-1~deb11u1Fixed in 128.9.0esr-1~deb11u1Fixed in 128.8.0esr-1~deb12u1Fixed in 128.10.0esr-1~deb12u1Fixed in 128.9.0esr-2Fixed in 128.10.0esr-1
  15. Upgrade

    Upgrade debian/libusrsctp to a version that resolves this vulnerability.

    Fixed in 0.9.3.0+20201102-2Fixed in 0.9.5.0-2
  16. Upgrade

    Upgrade debian/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:115.12.0-1~deb11u1Fixed in 1:128.10.0esr-1~deb11u1Fixed in 1:128.8.0esr-1~deb12u1Fixed in 1:128.10.0esr-1~deb12u1Fixed in 1:128.9.0esr-1Fixed in 1:128.10.0esr-1

Event History

Mar 6, 2020
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Jan 11, 2024
Data Sourced
via Launchpad·11:27 PM
Description
Sep 20, 2024
Data Sourced
via Ubuntu·02:16 AM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2019-20503?

CVE-2019-20503 is a vulnerability in WebRTC that allows for out of bounds reads when parameters are partially outside a chunk.

2

How does CVE-2019-20503 impact Mozilla Firefox?

CVE-2019-20503 affects Mozilla Firefox version up to 74 and Firefox ESR version up to 68.6, potentially allowing for out of bounds reads.

3

How does CVE-2019-20503 impact Apple Safari, iOS, iPadOS, watchOS, and tvOS?

CVE-2019-20503 impacts Apple Safari, iOS, iPadOS, watchOS, and tvOS versions up to 13.1.1, 13.5, 13.5, 6.2.5, and 13.4.5 respectively, potentially allowing for out of bounds reads.

4

What is the severity of CVE-2019-20503?

CVE-2019-20503 is classified as a medium severity vulnerability with a severity score of 4 out of 10.

5

How can I fix CVE-2019-20503?

To fix CVE-2019-20503, update to the latest version of the affected software, such as Mozilla Firefox 74 or Apple Safari 13.1.1.

Company

Resources

Contact

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