Important: thunderbird

Issue Overview:

When deriving an identifier for an email message, uninitialized memory was used in addition to the message contents. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6792)

When processing an email message with an ill-formed envelope, Thunderbird could read data from a random memory location. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6793)

Mozilla developers and community members reported memory safety bugs present in Firefox 72 and Firefox ESR 68.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5. (CVE-2020-6800)

If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5. (CVE-2020-6798)

If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Thunderbird 60. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6794)

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6795)

Affected Packages:

thunderbird

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update thunderbird to update your system.

New Packages:

aarch64:  
    thunderbird-68.5.0-1.amzn2.0.1.aarch64  
    thunderbird-debuginfo-68.5.0-1.amzn2.0.1.aarch64  
  
src:  
    thunderbird-68.5.0-1.amzn2.0.1.src  
  
x86_64:  
    thunderbird-68.5.0-1.amzn2.0.1.x86_64  
    thunderbird-debuginfo-68.5.0-1.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2020-6792, CVE-2020-6793, CVE-2020-6794, CVE-2020-6795, CVE-2020-6798, CVE-2020-6800

Mitre: CVE-2020-6792, CVE-2020-6793, CVE-2020-6794, CVE-2020-6795, CVE-2020-6798, CVE-2020-6800