CVE-2018-0487

ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a crafted certificate chain that is mishandled during RSASSA-PSS signature verification within a TLS or DTLS session.

ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a crafted certificate chain that is mishandled during RSASSA-PSS signature verification within a TLS or DTLS session.

The mbedtls package has been updated to fix several security issues.

Fixed a heap corruption issue in the implementation of the truncated HMAC extension. When the truncated HMAC extension is enabled and CBC is used, sending a malicious application packet could be used to selectively corrupt 6 bytes on the peer's heap, which could potentially lead to crash or remote code execution. The issue could be triggered remotely from either side in both TLS and DTLS. (CVE-2018-0488)

Fixed a buffer overflow in RSA-PSS verification when the hash was too large for the key size, which could potentially lead to crash or remote code execution. (CVE-2018-0487)

This update for mbedtls fixes the following issues:

• CVE-2018-0487: Fixed a buffer overflow in RSASSA-PSS signature verification, which allowed remote attackers to execute arbitrary code or cause a denial of service via a crafted certificate chain. (boo#1080826)
• CVE-2018-0488: Fixed a heap vulnerability, which allowed remote attackers to execute arbitrary code or cause a DoS via a crafted application packet when the truncated HMAC extension and CBC are used. (boo#1080828)
• CVE-2017-18187: Fixed bound check in ssl_parse_client_psk_identity(), which might lead to an overflow. (boo#1080973)

This update for mbedtls fixes the following issues:

• CVE-2018-0487: Fixed a buffer overflow in RSASSA-PSS signature verification, which allowed remote attackers to execute arbitrary code or cause a denial of service via a crafted certificate chain. (boo#1080826)
• CVE-2018-0488: Fixed a heap vulnerability, which allowed remote attackers to execute arbitrary code or cause a DoS via a crafted application packet when the truncated HMAC extension and CBC are used. (boo#1080828)
• CVE-2017-18187: Fixed bound check in ssl_parse_client_psk_identity(), which might lead to an overflow. (boo#1080973)

These are all security issues fixed in the libmbedcrypto7-2.27.0-1.2 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libeverest-3.6.6-1.1 package on the GA media of openSUSE Tumbleweed.

It was discovered that mbedtls has a bounds-check bypass through an integer overflow that can be used by an attacked to execute arbitrary code or cause a denial of service. (CVE-2017-18187)

It was discovered that mbedtls has a vulnerability where an attacker could execute arbitrary code or cause a denial of service (buffer overflow) via a crafted certificate chain that is mishandled during RSASSA-PSS signature verification within a TLS or DTLS session. (CVE-2018-0487)

It was discovered that mbedtls has a vulnerability where an attacker could execute arbitrary code or cause a denial of service (heap corruption) via a crafted application packet within a TLS or DTLS session. (CVE-2018-0488)

It was discovered that mbedtls has a vulnerability that allows remote attackers to achieve partial plaintext recovery (for a CBC based ciphersuite) via a timing-based side-channel attack. (CVE-2018-0497)

It was discovered that mbedtls has a vulnerability that allows local users to achieve partial plaintext recovery (for a CBC based ciphersuite) via a cache-based side-channel attack. (CVE-2018-0498)