CVE-2021-23953
First published: Tue Jan 26 2021(Updated: )
If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/firefox | 118.0.2-1 | |
| debian/firefox-esr | 91.12.0esr-1~deb10u1 115.3.1esr-1~deb10u1 102.15.0esr-1~deb11u1 115.3.1esr-1~deb11u1 102.15.1esr-1~deb12u1 115.3.0esr-1~deb12u1 115.3.0esr-1 | |
| debian/thunderbird | 1:91.12.0-1~deb10u1 1:115.3.1-1~deb10u1 1:102.13.1-1~deb11u1 1:115.3.1-1~deb11u1 1:102.15.1-1~deb12u1 1:115.3.1-1~deb12u1 1:115.3.1-1 | |
| Thunderbird | <78.7 | 78.7 |
| Firefox | <85.0 | |
| Firefox ESR | <78.7 | |
| Thunderbird | <78.7 | |
| Firefox | <85 | 85 |
| Firefox ESR | <78.7 | 78.7 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1683940
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-03/
- https://www.mozilla.org/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-05/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23953
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/#CVE-2021-23953
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/#CVE-2021-23953
- https://security-tracker.debian.org/tracker/CVE-2021-23953
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2021-23953?
CVE-2021-23953 has a severity rating that indicates it can lead to the leakage of sensitive cross-origin information.
How do I fix CVE-2021-23953?
To fix CVE-2021-23953, update Mozilla Firefox, Firefox ESR, or Thunderbird to versions later than 85, 78.7 respectively.
Which software is affected by CVE-2021-23953?
CVE-2021-23953 affects specific versions of Mozilla Thunderbird and Firefox, including 78.7 or earlier versions.
Can CVE-2021-23953 be exploited remotely?
Yes, CVE-2021-23953 can be exploited remotely if a user interacts with a specially crafted PDF.
What type of vulnerability is CVE-2021-23953?
CVE-2021-23953 is a cross-origin information leakage vulnerability related to the handling of chunked data in PDF files.
- collector/security-tracker-debian
- agent/first-publish-date
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- collector/mitre-cve
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- source/Mozilla
- agent/software-canonical-lookup
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- agent/tags
- agent/softwarecombine
- package-manager/debian
- vendor/mozilla
- canonical/thunderbird
- canonical/firefox
- canonical/firefox esr