Medium 4.3Published Dec 6, 2010

CVE-2010-4180OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is enabled, does not properly prevent modification of the ciphersuite in the session cache, which allows r…

Updated under an hour ago (Nov 2, 2026, 12:20 AM ET)

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OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is enabled, does not properly prevent modification of the ciphersuite in the session cache, which allows remote attackers to force the downgrade to an unintended cipher via vectors involving sniffing network traffic to discover a session identifier.

CVSS: 4.3 MEDIUM (v2.0, NVD)AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	before 0.9.8q; from 1.0.0 before 1.0.0c	NVD
fedoraproject fedora fedoraproject:fedora	13; 14	NVD
debian debian_linux debian:debian_linux	5.0	NVD
canonical ubuntu_linux canonical:ubuntu_linux	6.06; 8.04; 9.04; 10.04; 10.10	NVD
opensuse opensuse opensuse:opensuse	11.1; 11.2; 11.3; 11.4	NVD
suse linux_enterprise suse:linux_enterprise	11.0	NVD
suse linux_enterprise_desktop suse:linux_enterprise_desktop	10; 10; 11	NVD
suse linux_enterprise_server suse:linux_enterprise_server	9; 10; 10	NVD
f5 nginx f5:nginx	before 0.9.2	NVD

References

References

http://cvs.openssl.org/chngview?cn=20131	broken-link, patch
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777	broken-link
http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html	broken-link, mailing-list, third-party-advisory
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052027.html	mailing-list, third-party-advisory
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052315.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00003.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00013.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00014.html	mailing-list, third-party-advisory
http://marc.info/?l=bugtraq&m=129916880600544&w=2	issue-tracking, third-party-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.