USN-5388-2: OpenJDK vulnerabilities

26 April 2022

Several security issues were fixed in OpenJDK.

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Details

It was discovered that OpenJDK incorrectly verified ECDSA signatures. An
attacker could use this issue to bypass the signature verification process.
(CVE-2022-21449)

It was discovered that OpenJDK incorrectly limited memory when compiling a
specially crafted XPath expression. An attacker could possibly use this
issue to cause a denial of service. (CVE-2022-21426)

It was discovered that OpenJDK incorrectly handled converting certain
object arguments into their textual representations. An attacker could
possibly use this issue to cause a denial of service. (CVE-2022-21434)

It was discovered that OpenJDK incorrectly validated the encoded length of
certain object identifiers. An attacker could possibly use this issue to
cause a denial of service. (CVE-2022-21443)

It was discovered that OpenJDK incorrectly validated certain paths. An
attacker could possibly use this issue to bypass the secure validation
feature and expose sensitive information in XML files. (CVE-2022-21476)

It was discovered that OpenJDK incorrectly parsed certain URI strings. An
attacker could possibly use this issue to make applications accept
invalid of malformed URI strings. (CVE-2022-21496)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 22.04
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any Java
applications or applets to make all the necessary changes.

References

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