CVE-2021-23993

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Summary

CVECVE-2021-23993
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-06-24 14:15:00 UTC
Updated2023-08-08 14:22:00 UTC
DescriptionAn attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. This vulnerability affects Thunderbird < 78.9.1.

Risk And Classification

Problem Types: CWE-347

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mozilla Thunderbird All All All All

References

ReferenceSourceLinkTags
Security Vulnerabilities fixed in Thunderbird 78.9.1 — Mozilla MISC www.mozilla.org
Access Denied MISC bugzilla.mozilla.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159147 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2021-1192)
  • 159148 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2021-1193)
  • 178561 Debian Security Update for thunderbird (DSA 4897-1)
  • 178644 Debian Security Update for thunderbird (DLA 2632-1)
  • 179874 Debian Security Update for thunderbird (CVE-2021-23993)
  • 198415 Ubuntu Security Notification for Thunderbird vulnerabilities (USN-4995-1)
  • 198424 Ubuntu Security Notification for Thunderbird vulnerabilities (USN-4995-2)
  • 239221 Red Hat Update for thunderbird (RHSA-2021:1201)
  • 239223 Red Hat Update for thunderbird (RHSA-2021:1193)
  • 239224 Red Hat Update for thunderbird (RHSA-2021:1192)
  • 239225 Red Hat Update for thunderbird (RHSA-2021:1190)
  • 257078 CentOS Security Update for thunderbird (CESA-2021:1192)
  • 296068 Oracle Solaris 11.4 Support Repository Update (SRU) 34.94.4 Missing (CPUAPR2021)
  • 352368 Amazon Linux Security Advisory for thunderbird: ALAS2-2021-1644
  • 375465 Mozilla Thunderbird Multiple Vulnerabilities (MFSA2021-13)
  • 750260 OpenSUSE Security Update for MozillaThunderbird (openSUSE-SU-2021:0580-1)
  • 940242 AlmaLinux Security Update for thunderbird (ALSA-2021:1193)
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