CVE-2011-4973
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the...
CVE-2011-4973 is a critical vulnerability (CVSS 9.8) in Mod Nss Project Nss, published February 15, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 63rd percentile. Fixed in mod_nss 0:1.0.8-13.el6.
- Severity
- 9.8 CriticalCVSS 3.0, NVD
- Exploit chance
- 1.00%EPSS, 63rd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0:1.0.8-13.el6mod_nss +13 more
Description
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mod_nssRed Hat:enterprise_linux:6::client | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nss-debuginfoRed Hat:enterprise_linux:6::client | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nssRed Hat:enterprise_linux:6::computenode | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nss-debuginfoRed Hat:enterprise_linux:6::computenode | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nssRed Hat:enterprise_linux:6::server | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nss-debuginfoRed Hat:enterprise_linux:6::server | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nssRed Hat:enterprise_linux:6::workstation | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nss-debuginfoRed Hat:enterprise_linux:6::workstation | before 0:1.0.8-13.el6 | 0:1.0.8-13.el6 |
mod_nssRed Hat:enterprise_linux:5::client | before 0:1.0.8-7.el5 | 0:1.0.8-7.el5 |
mod_nss-debuginfoRed Hat:enterprise_linux:5::client | before 0:1.0.8-7.el5 | 0:1.0.8-7.el5 |
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| Package | Affected | Fixed |
|---|---|---|
mod_nssRed Hat:enterprise_linux:5::server | before 0:1.0.8-7.el5 | 0:1.0.8-7.el5 |
mod_nss-debuginfoRed Hat:enterprise_linux:5::server | before 0:1.0.8-7.el5 | 0:1.0.8-7.el5 |
libapache2-mod-nssUbuntu:16.04:LTS | All versions, plus listed versions 1.0.11-11.0.12-11.0.12-2 | None known |
libapache2-mod-nssUbuntu:18.04:LTS | All versions, plus listed versions 1.0.14-1build1 | None known |
What each source reports
NVD Score used
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
- Record
CVE-2011-4973- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE ListNo score
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
- Record
CVE-2011-4973- Updated
- 2026-11-02
EUVDEUVD-2011-4878No score
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
- Record
EUVD-2011-4878- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mmjq-r7xw-fqr8
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the...
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
- Record
GHSA-mmjq-r7xw-fqr8- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2011-4973
Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.
- Record
UBUNTU-CVE-2011-4973- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
bugzilla.redhat.com/show_bug.cgi?id=1017197
redhat.com/archives/mod_nss-list/2011-May/msg00001.html
nvd.nist.gov/vuln/detail/CVE-2011-4973
github.com/advisories/GHSA-mmjq-r7xw-fqr8
access.redhat.com/errata/RHBA-2011:1656
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security.access.redhat.com/data/csaf/v2/advisories/2011/rhba-2011_1656.json
cve.org/CVERecord?id=CVE-2011-4973
ubuntu.com/security/CVE-2011-4973
openwall.com/lists/oss-security/2013/11/14/12