Calendar discovery accepted local file and remote network share locations
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Mozilla Thunderbird, the email and calendar client, is affected when it discovers calendars on a server during account setup or when adding a network calendar. An attacker-controlled server, or a network attacker on unencrypted HTTP, could trick it into subscribing to malicious locations, potentially leaking Windows NTLM credentials or overwriting local files.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
When looking for calendars in a directory on a server, during account setup or when adding a new network calendar, Thunderbird accepted calendar locations pointing to other servers, local files or network shares. A malicious server, or a network attacker when the lookup used plain HTTP, could make Thunderbird subscribe to such a location. On Windows this could leak the user's NTLM credentials to an attacker-controlled host on every calendar refresh, and changes to the calendar could be written to the attacker's share or overwrite a local file. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.
Timeline
- CVE published
- First seen by cve.now
- Record last updated
Affected versions
- Mozilla Thunderbird
Version range not reported