CVE-2015-0291: Null Pointer Dereference
First published: Mon Mar 16 2015(Updated: )
A NULL pointer dereference flaw was found in the way OpenSSL handled renegotiation requests with an invalid Signature Algorithms extension. A remote attacker could use this flaw to cause an OpenSSL server to crash. This issue affects OpenSSL version 1.0.2, and was fixed in version 1.0.2a. Acknowledgements: Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges David Ramos of Stanford University as the original reporter.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/openssl | <1.0.2 | 1.0.2 |
| OpenSSL libcrypto | =1.0.2 | |
| OpenSSL libcrypto | =1.0.2-beta1 | |
| OpenSSL libcrypto | =1.0.2-beta2 | |
| OpenSSL libcrypto | =1.0.2-beta3 |
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Reference Links
- http://marc.info/?l=bugtraq&m=143748090628601&w=2
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- http://marc.info/?l=bugtraq&m=144050297101809&w=2
- http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://www.securityfocus.com/bid/73235
- http://www.securitytracker.com/id/1031929
- https://bto.bluecoat.com/security-advisory/sa92
- https://bugzilla.redhat.com/show_bug.cgi?id=1202338
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git;a=commit;h=76343947ada960b6269090638f5391068daee88d
- https://kc.mcafee.com/corporate/index?page=content&id=SB10110
- https://security.gentoo.org/glsa/201503-11
- https://www.openssl.org/news/secadv_20150319.txt
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c70a1fee
- https://openssl.org/news/secadv_20150319.txt
- https://access.redhat.com/articles/1384453
- https://git.openssl.org/?p=openssl.git;a=commitdiff;h=76343947ada960b6269090638f5391068daee88d
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=76343947ada960b6269090638f5391068daee88d
Frequently Asked Questions
What is the severity of CVE-2015-0291?
CVE-2015-0291 is considered a moderate severity vulnerability due to the potential for a remote denial of service.
How do I fix CVE-2015-0291?
To mitigate CVE-2015-0291, upgrade OpenSSL to version 1.0.2a or later.
Which versions of OpenSSL are affected by CVE-2015-0291?
OpenSSL versions 1.0.2, 1.0.2-beta1, 1.0.2-beta2, and 1.0.2-beta3 are all affected by CVE-2015-0291.
What impact can CVE-2015-0291 have on my server?
CVE-2015-0291 can cause an OpenSSL server to crash, leading to potential downtime and service interruption.
Is CVE-2015-0291 exploitable remotely?
Yes, CVE-2015-0291 can be exploited remotely by an attacker due to improper handling of renegotiation requests.
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