Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities have been identified in Mozilla Thunderbird as packaged for Red Hat Enterprise Linux 9. These include a user interface misrepresentation of attachment URLs, information disclosure of the /tmp directory listing, and leakage of hashed Windows credentials via crafted attachment URLs. Red Hat has issued an important security update to address these issues in Thunderbird packages for various Red Hat Enterprise Linux 9 variants.
AI Analysis
Technical Summary
This advisory covers three distinct vulnerabilities in Mozilla Thunderbird related to attachment URL handling and information disclosure. CVE-2025-3523 involves UI misrepresentation of attachment URLs, potentially misleading users. CVE-2025-2830 allows disclosure of the /tmp directory listing, exposing potentially sensitive information. CVE-2025-3522 involves leaking hashed Windows credentials through crafted attachment URLs. Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its extended update support variants to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to information disclosure, including exposure of temporary directory contents and hashed credentials, and user interface deception that may facilitate phishing or social engineering attacks. These impacts can compromise user privacy and security when handling email attachments.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its extended update support versions. Users should apply these official updates promptly to remediate the vulnerabilities. For detailed update instructions, refer to Red Hat's advisory and article at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the vendor-provided patches.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities have been identified in Mozilla Thunderbird as packaged for Red Hat Enterprise Linux 9. These include a user interface misrepresentation of attachment URLs, information disclosure of the /tmp directory listing, and leakage of hashed Windows credentials via crafted attachment URLs. Red Hat has issued an important security update to address these issues in Thunderbird packages for various Red Hat Enterprise Linux 9 variants.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers three distinct vulnerabilities in Mozilla Thunderbird related to attachment URL handling and information disclosure. CVE-2025-3523 involves UI misrepresentation of attachment URLs, potentially misleading users. CVE-2025-2830 allows disclosure of the /tmp directory listing, exposing potentially sensitive information. CVE-2025-3522 involves leaking hashed Windows credentials through crafted attachment URLs. Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its extended update support variants to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to information disclosure, including exposure of temporary directory contents and hashed credentials, and user interface deception that may facilitate phishing or social engineering attacks. These impacts can compromise user privacy and security when handling email attachments.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its extended update support versions. Users should apply these official updates promptly to remediate the vulnerabilities. For detailed update instructions, refer to Red Hat's advisory and article at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the vendor-provided patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:4229
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-3522","CVE-2025-3523"]
Threat ID: 6a4049ed27e9c797198374e1
Added to database: 06/27/2026, 22:08:45 UTC
Last enriched: 06/27/2026, 22:42:23 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 145
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