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CVE-2008-5077

Status Candidate

Overview

OpenSSL 0.9.8i and earlier does not properly check the return value from the EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys.

Related Files

HP Security Bulletin HPSBOV02540 SSRT090249
Posted Jun 18, 2010
Authored by Hewlett Packard | Site hp.com

HP Security Bulletin - Potential security vulnerabilities have been identified with HP SSL for OpenVMS. The vulnerabilities could be remotely exploited resulting in unauthorized data injection or a Denial of Service (DoS).

tags | advisory, denial of service, vulnerability
advisories | CVE-2008-5077, CVE-2009-0590, CVE-2009-0591, CVE-2009-0789, CVE-2009-3245
MD5 | b134d55a57e80dbade7837d63cb7577c
HP Security Bulletin HPSBMA02426 SSRT090053
Posted May 19, 2009
Authored by Hewlett Packard | Site hp.com

HP Security Bulletin - Potential security vulnerabilities have been identified with HP System Management

tags | advisory, vulnerability
advisories | CVE-2008-5077, CVE-2008-5814
MD5 | 1381726df24cbba5dce7400bcc237799
Gentoo Linux Security Advisory 200904-5
Posted Apr 6, 2009
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200904-05 - An error in the OpenSSL certificate chain validation in ntp might allow for spoofing attacks. It has been reported that ntp incorrectly checks the return value of the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA 200902-02). Versions less than 4.2.4_p6 are affected.

tags | advisory, spoof
systems | linux, gentoo
advisories | CVE-2008-5077, CVE-2009-0021
MD5 | 0c5dd387f687f59dc506f4ebb4ed7577
HP Security Bulletin HPSBUX02418 SSRT090002
Posted Apr 1, 2009
Authored by Hewlett Packard | Site hp.com

HP Security Bulletin - A potential security vulnerability has been identified with HP-UX running OpenSSL. The vulnerability could be exploited remotely to allow an unauthorized access.

tags | advisory
systems | hpux
advisories | CVE-2008-5077
MD5 | 149213805e592383896aa3653d449dc7
VMware Security Advisory 2009-0004
Posted Apr 1, 2009
Authored by VMware | Site vmware.com

VMware Security Advisory - ESX patches for OpenSSL, vim and bind resolve several security issues. OpenSSL 0.9.7a-33.24 and earlier does not properly check the return value from the EVP_VerifyFinal function, which could allow a remote attacker to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys. A flaw was discovered in the way Berkeley Internet Name Domain (BIND) checked the return value of the OpenSSL DSA_do_verify function. On systems using DNSSEC, a malicious zone could present a malformed DSA certificate and bypass proper certificate validation, allowing spoofing attacks. Various vulnerabilities were discovered in vim such as format string issues and input validation problems.

tags | advisory, remote, spoof, vulnerability
advisories | CVE-2008-5077, CVE-2009-0025, CVE-2008-4101, CVE-2008-3432, CVE-2008-2712, CVE-2007-2953
MD5 | 72bd6ac825de9be07893cde9c93b5c6a
Gentoo Linux Security Advisory 200902-2
Posted Feb 12, 2009
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200902-02 - An error in the OpenSSL certificate chain validation might allow for spoofing attacks. The Google Security Team reported that several functions incorrectly check the result after calling the EVP_VerifyFinal() function, allowing a malformed signature to be treated as a good signature rather than as an error. This issue affects the signature checks on DSA and ECDSA keys used with SSL/TLS. Versions less than 0.9.8j are affected.

tags | advisory, spoof
systems | linux, gentoo
advisories | CVE-2008-5077
MD5 | 66e099f2e917fe37f6db3def97021f60
Debian Linux Security Advisory 1701-1
Posted Jan 12, 2009
Authored by Debian | Site debian.org

Debian Security Advisory 1701-1 - It was discovered that OpenSSL does not properly verify DSA signatures on X.509 certificates due to an API misuse, potentially leading to the acceptance of incorrect X.509 certificates as genuine (CVE-2008-5077).

tags | advisory
systems | linux, debian
advisories | CVE-2008-5077
MD5 | 2c2856e8c3bdccd320b3934bc2466311
Mandriva Linux Security Advisory 2009-001
Posted Jan 9, 2009
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2009-001 - A vulnerability was found by the Google Security Team with how OpenSSL checked the verification of certificates. An attacker in control of a malicious server or able to effect a man-in-the-middle attack, could present a malformed SSL/TLS signature from a certificate chain to a vulnerable client, which would then bypass the certificate validation. The updated packages have been patched to prevent this issue.

tags | advisory
systems | linux, mandriva
advisories | CVE-2008-5077
MD5 | 1c6c72c0bc98167e9bf07aa33780150a
FreeBSD Security Advisory SA-09:02 - OpenSSL
Posted Jan 7, 2009
Site security.freebsd.org

FreeBSD Security Advisory - The EVP_VerifyFinal() function from OpenSSL is used to determine if a digital signature is valid. The SSL layer in OpenSSL uses EVP_VerifyFinal(), which in several places checks the return value incorrectly and treats verification errors as a good signature. This is only a problem for DSA and ECDSA keys.

tags | advisory
systems | freebsd
advisories | CVE-2008-5077
MD5 | 2328586310ef4612f8f258d3c8e4f921
Ubuntu Security Notice 704-1
Posted Jan 7, 2009
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice USN-704-1 - It was discovered that OpenSSL did not properly perform signature verification on DSA and ECDSA keys. If user or automated system connected to a malicious server or a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2008-5077
MD5 | 077790a3f249b28578aa11ebed3c7d63
OpenSSL Security Advisory 07-Jan-2009
Posted Jan 7, 2009
Site openssl.org

Several functions inside OpenSSL incorrectly checked the result aftercalling the EVP_VerifyFinal function, allowing a malformed signatureto be treated as a good signature rather than as an error. This issueaffected the signature checks on DSA and ECDSA keys used withSSL/TLS.One way to exploit this flaw would be for a remote attacker who is incontrol of a malicious server or who can use a 'man in the middle'attack to present a malformed SSL/TLS signature from a certificate chainto a vulnerable client, bypassing validation.

tags | advisory, remote
advisories | CVE-2008-5077
MD5 | 5ff1f702db3b6ad0f391aaa8dc65fdbb
Open Source CERT Security Advisory 2008.16
Posted Jan 7, 2009
Authored by Will Drewry, Open Source CERT | Site ocert.org

Several functions inside the OpenSSL library incorrectly check the result after calling the EVP_VerifyFinal function. This bug allows a malformed signature to be treated as a good signature rather than as an error. This issue affects the signature checks on DSA and ECDSA keys used with SSL/TLS. The flaw may be exploited by a malicious server or a man-in-the-middle attack that presents a malformed SSL/TLS signature from a certificate chain to a vulnerable client, bypassing validation.

tags | advisory
advisories | CVE-2008-5077, CVE-2008-0021, CVE-2008-0025
MD5 | be0e81721da50c8f104a4d26e99d8d02
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