CVE-2021-29948

Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. This vulnerability affects Thunderbird < 78.10.

Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. This vulnerability affects Thunderbird < 78.10.

More internal network hosts could have been probed by a malicious webpage: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine (CVE-2021-23961).

Out of bound write due to lazy initialization: A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write (CVE-2021-23994).

Use-after-free in Responsive Design Mode: When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code (CVE-2021-23995).

Secure Lock icon could have been spoofed: Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page (CVE-2021-23998).

Blob URLs may have been granted additional privileges: If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content (CVE-2021-23999).

Arbitrary FTP command execution on FTP servers using an encoded URL: When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server (CVE-2021-24002).

Incorrect size computation in WebAssembly JIT could lead to null-reads: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. Note: This issue only affected x86-32 platforms. Other platforms are unaffected. (CVE-2021-29945).

Port blocking could be bypassed: Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header (CVE-2021-29946).

Race condition when reading from disk while verifying signatures: Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file (CVE-2021-29948).

This update for MozillaThunderbird fixes the following issues:

• Firefox was updated to 78.10.0 ESR (bsc#1184960)
  • CVE-2021-23994: Out of bound write due to lazy initialization
  • CVE-2021-23995: Use-after-free in Responsive Design Mode
  • CVE-2021-23998: Secure Lock icon could have been spoofed
  • CVE-2021-23961: More internal network hosts could have been probed by a malicious webpage
  • CVE-2021-23999: Blob URLs may have been granted additional privileges
  • CVE-2021-24002: Arbitrary FTP command execution on FTP servers using an encoded URL
  • CVE-2021-29945: Incorrect size computation in WebAssembly JIT could lead to null-reads
  • CVE-2021-29946: Port blocking could be bypassed
  • CVE-2021-29948: Race condition when reading from disk while verifying signatures

This update was imported from the SUSE:SLE-15-SP2:Update update project.

These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for MozillaThunderbird fixes the following issues:

• Firefox was updated to 78.10.0 ESR (bsc#1184960)
  • CVE-2021-23994: Out of bound write due to lazy initialization
  • CVE-2021-23995: Use-after-free in Responsive Design Mode
  • CVE-2021-23998: Secure Lock icon could have been spoofed
  • CVE-2021-23961: More internal network hosts could have been probed by a malicious webpage
  • CVE-2021-23999: Blob URLs may have been granted additional privileges
  • CVE-2021-24002: Arbitrary FTP command execution on FTP servers using an encoded URL
  • CVE-2021-29945: Incorrect size computation in WebAssembly JIT could lead to null-reads
  • CVE-2021-29946: Port blocking could be bypassed
  • CVE-2021-29948: Race condition when reading from disk while verifying signatures

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981, CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998, CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)

It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spoof a website and trick the user into providing credentials. (CVE-2021-23984)

Multiple security issues were discovered in Thunderbird's OpenPGP integration. If a user were tricked into importing a specially crafted key in some circumstances, an attacker could potentially exploit this to cause a denial of service (inability to send encrypted email) or confuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)

A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-23995)

It was discovered that Thunderbird mishandled ftp URLs with encoded newline characters. If a user were tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary FTP commands. (CVE-2021-24002)

It was discovered that Thunderbird wrote signatures to disk and read them back during verification. A local attacker could potentially exploit this to replace the data with another signature file. (CVE-2021-29948)

It was discovered that Thunderbird might load an alternative OTR library. If a user were tricked into copying a specially crafted library to one of Thunderbird's search paths, an attacker could potentially exploit this to execute arbitrary code. (CVE-2021-29949)

It was discovered that secret keys imported into Thunderbird were stored unencrypted. A local attacker could potentially exploit this to obtain private keys. (CVE-2021-29956)

It was discovered that Thunderbird did not indicate when an inline signed or encrypted message contained additional unprotected parts. (CVE-2021-29957)

USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides the corresponding updates for Ubuntu 18.04 LTS.

Original advisory details:

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981, CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998, CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)

It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spoof a website and trick the user into providing credentials. (CVE-2021-23984)

Multiple security issues were discovered in Thunderbird's OpenPGP integration. If a user were tricked into importing a specially crafted key in some circumstances, an attacker could potentially exploit this to cause a denial of service (inability to send encrypted email) or confuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)

A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-23995)

It was discovered that Thunderbird mishandled ftp URLs with encoded newline characters. If a user were tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary FTP commands. (CVE-2021-24002)

It was discovered that Thunderbird wrote signatures to disk and read them back during verification. A local attacker could potentially exploit this to replace the data with another signature file. (CVE-2021-29948)

It was discovered that Thunderbird might load an alternative OTR library. If a user were tricked into copying a specially crafted library to one of Thunderbird's search paths, an attacker could potentially exploit this to execute arbitrary code. (CVE-2021-29949)

It was discovered that secret keys imported into Thunderbird were stored unencrypted. A local attacker could potentially exploit this to obtain private keys. (CVE-2021-29956)

It was discovered that Thunderbird did not indicate when an inline signed or encrypted message contained additional unprotected parts. (CVE-2021-29957)