CVE-2024-28835

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.(CVE-2024-28835)

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: vulnerable to Minerva side-channel information leak (CVE-2024-28834)
• gnutls: potential crash during chain building/verification (CVE-2024-28835)

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.

The gnutls package provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: vulnerable to Minerva side-channel information leak (CVE-2024-28834)
• gnutls: potential crash during chain building/verification (CVE-2024-28835)

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.

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

• CVE-2024-28835: fix crash when verifying a certificate chain with more than 16 certificates

• CVE-2024-28834: fix side-channel leak in the deterministic ECDSA
• CVE-2024-28835: fix crash when verifying a certificate chain with more than 16 certificates

• CVE-2024-28835: fix memory leak

The Minerva attack is a cryptographic vulnerability that exploits deterministic behavior in systems like GnuTLS, leading to side-channel leaks. In specific scenarios, such as when using the GNUTLS_PRIVKEY_FLAG_REPRODUCIBLE flag, it can result in a noticeable step in nonce size from 513 to 512 bits, exposing a potential timing side-channel. (CVE-2024-28834) A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command. (CVE-2024-28835)

These are all security issues fixed in the gnutls-3.8.4-1.1 package on the GA media of openSUSE Tumbleweed.

The gnutls package provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: vulnerable to Minerva side-channel information leak (CVE-2024-28834)

• gnutls: potential crash during chain building/verification (CVE-2024-28835)

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.

This update for gnutls fixes the following issues:

• CVE-2024-28834: Fixed side-channel in the deterministic ECDSA (bsc#1221746)
• CVE-2024-28835: Fixed denial of service during certificate chain verification (bsc#1221747)

Other fixes:

• jitterentropy: Release the memory of the entropy collector when using jitterentropy with phtreads as there is also a pre-intitization done in the main thread (bsc#1221242)

This update for gnutls fixes the following issues:

• CVE-2024-28834: Fixed side-channel in the deterministic ECDSA (bsc#1221746)
• CVE-2024-28835: Fixed denial of service during certificate chain verification (bsc#1221747)

Other fixes:

• jitterentropy: Release the memory of the entropy collector when using jitterentropy with phtreads as there is also a pre-intitization done in the main thread (bsc#1221242)

This update for gnutls fixes the following issues:

• CVE-2024-28834: Fixed side-channel in the deterministic ECDSA (bsc#1221746)
• CVE-2024-28835: Fixed denial of service during certificate chain verification (bsc#1221747)

Other fixes:

• jitterentropy: Release the memory of the entropy collector when using jitterentropy with phtreads as there is also a pre-intitization done in the main thread (bsc#1221242)

This update for gnutls fixes the following issues:

• CVE-2024-28835: Fixed a certtool crash when verifying a certificate chain (bsc#1221747).
• CVE-2024-28834: Fixed a side-channel attack in the deterministic ECDSA (bsc#1221746).

Other fixes:

• Fixed a memory leak when using the entropy collector (bsc#1221242).

This update for gnutls fixes the following issues:

• CVE-2024-28835: certtool crash when verifying a certificate chain (bsc#1221747)
• CVE-2024-28834: Fixed side-channel in the deterministic ECDSA (bsc#1221746)
• jitterentropy: Release the memory of the entropy collector when using jitterentropy with phtreads as there is also a pre-initialization done in the main thread. (bsc#1221242)

It was discovered that GnuTLS had a timing side-channel when performing certain ECDSA operations. A remote attacker could possibly use this issue to recover sensitive information. (CVE-2024-28834)

It was discovered that GnuTLS incorrectly handled verifying certain PEM bundles. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.10. (CVE-2024-28835)

USN-6733-1 fixed vulnerabilities in GnuTLS. This update provides the corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that GnuTLS had a timing side-channel when performing certain ECDSA operations. A remote attacker could possibly use this issue to recover sensitive information. (CVE-2024-28834)

It was discovered that GnuTLS incorrectly handled verifying certain PEM bundles. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.10. (CVE-2024-28835)