[USN-5494-1] SpiderMonkey JavaScript Library vulnerabilities

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Ubuntu Security Notice USN-5494-1
June 27, 2022

mozjs91 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in SpiderMonkey JavaScript Library.

Software Description:
- mozjs91: SpiderMonkey JavaScript library

Details:

It was discovered that SpiderMonkey JavaScript Library incorrectly
generated certain assembly code. An remote attacker could
possibly use this issue to cause a crash or expose sensitive
information. (CVE-2022-28285)

It was discovered that SpiderMonkey JavaScript Library incorrectly
generated certain assembly code. An remote attacker could
possibly use this issue to cause a crash. (CVE-2022-31740)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
libmozjs-91-0 91.10.0-0ubuntu1

After a standard system update you need to restart any application that use
SpiderMonkey JavaScript Library to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5494-1
CVE-2022-28285, CVE-2022-31740, https://launchpad.net/bugs/1976260, https://launchpad.net/bugs/1978961

Package Information:
https://launchpad.net/ubuntu/+source/mozjs91/91.10.0-0ubuntu1