SB2015061207 - Slackware Linux update for openssl

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Resource management error (CVE-ID: CVE-2015-1788)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application in the BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

2) Buffer overflow (CVE-ID: CVE-2015-1789)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the X509_cmp_time function in crypto/x509/x509_vfy.c. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

3) NULL pointer dereference (CVE-ID: CVE-2015-1790)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the PKCS7_dataDecodefunction in crypto/pkcs7/pk7_doit.c. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

4) Resource management error (CVE-ID: CVE-2015-1792)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in the do_free_upto function in crypto/cms/cms_smime.c in OpenSSL. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack via vectors that trigger a NULL value of a BIO data structure.

5) Race condition (CVE-ID: CVE-2015-1791)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in the ssl3_get_new_session_ticket function in ssl/s3_clnt.c in OpenSSL. A local user can exploit the race and cause a denial of service (double free and application crash) or possibly have unspecified other impact by providing a NewSessionTicket during an attempt to reuse a ticket that had been obtained earlier.

Remediation

Install update from vendor's website.

References

• http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.750596