#VU11535 Race condition in OpenSSL - CVE-2010-5298

Vulnerability identifier: #VU11535

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2010-5298

CWE-ID: CWE-362

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack or modify encrypted connection.

The vulnerability exists due to a race condition in the ssl3_read_bytes() function in OpenSSL. A remote attacker can inject data across sessions or cause a denial of service

Successful exploitation of the vulnerability requires that SSL_MODE_RELEASE_BUFFERS is enabled.

Mitigation
Update to version 1.0.0m or 1.0.1h.

Vulnerable software versions

OpenSSL: 1.0.0f - 1.0.0, 1.0.1g - 1.0.1

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External links
https://www.openssl.org/news/secadv/20140605.txt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.