Every CVE Search/ Get API key

CVE-2009-2730

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in...

7.5 HighFix available

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Exploit likelihood

2.15%Down 0.5 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Record
CVE-2009-2730
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-310
Updated
2026-11-02
CVE List No score

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Record
CVE-2009-2730
Updated
2026-11-02
EUVDEUVD-2009-2721 No score

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Record
EUVD-2009-2721
Updated
2026-11-03
GitHub AdvisoriesGHSA-x6gw-c9hx-x25f No score

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in...

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Record
GHSA-x6gw-c9hx-x25f
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gnutls13
Debian:4.0
From an advisory covering 2 CVEs
 before 1.4.4-3+etch5, plus listed versions
1.4.4-31.4.4-3+etch11.4.4-3+etch21.4.4-3+etch31.4.4-3+etch4
1.4.4-3+etch5
gnutls26
Debian:5.0
From an advisory covering 2 CVEs
 before 2.4.2-6+lenny2, plus listed versions
2.4.2-52.4.2-62.4.2-6+lenny1
2.4.2-6+lenny2
gnutls
Red Hat:enterprise_linux:4::as
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-devel
Red Hat:enterprise_linux:4::as
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-devel
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls
Red Hat:enterprise_linux:4::es
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
Show 14 moreShow less
Affected packages
PackageAffectedFixed
gnutls-devel
Red Hat:enterprise_linux:4::es
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls
Red Hat:enterprise_linux:4::ws
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls-devel
Red Hat:enterprise_linux:4::ws
 before 0:1.0.20-4.el4_8.3
0:1.0.20-4.el4_8.3
gnutls
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-debuginfo
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-devel
Red Hat:enterprise_linux:5::client_workstation
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls
Red Hat:enterprise_linux:5::client
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-utils
Red Hat:enterprise_linux:5::client
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls
Red Hat:enterprise_linux:5::server
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-devel
Red Hat:enterprise_linux:5::server
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5
gnutls-utils
Red Hat:enterprise_linux:5::server
 before 0:1.4.1-3.el5_3.5
0:1.4.1-3.el5_3.5

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-2730 is a high vulnerability (CVSS 7.5) in Gnu Gnutls, published August 12, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in gnutls 0:1.0.20-4.el4_8.3.

References

Show 15 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open