skopeo-1.13.3-3.el9_3

The skopeo command lets you inspect images from container image registries, get images and image layers, and use signatures to create and verify files.

Security Fix(es):

* golang: crypto/tls: slow verification of certificate chains containing large RSA keys (CVE-2023-29409)
* golang: html/template: improper handling of HTML-like comments within script contexts (CVE-2023-39318)
* golang: html/template: improper handling of special tags within script contexts (CVE-2023-39319)
* golang: crypto/tls: panic when processing post-handshake message on QUIC connections (CVE-2023-39321)
* golang: crypto/tls: lack of a limit on buffered post-handshake (CVE-2023-39322)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2023-29409
Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable.
CVE-2023-39318
The html/template package does not properly handle HTML-like "" comment tokens, nor hashbang "#!" comment tokens, in contexts. This may cause the template parser to improperly interpret the contents of contexts, causing actions to be improperly escaped. This may be leveraged to perform an XSS attack.
CVE-2023-39319
The html/template package does not apply the proper rules for handling occurrences of " contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack.
CVE-2023-39321
Processing an incomplete post-handshake message for a QUIC connection can cause a panic.
CVE-2023-39322
QUIC connections do not set an upper bound on the amount of data buffered when reading post-handshake messages, allowing a malicious QUIC connection to cause unbounded memory growth. With fix, connections now consistently reject messages larger than 65KiB in size.