Fedora 39 update for mod_auth_openidc
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2021-32786 CVE-2021-32791 CVE-2021-32792 CVE-2021-39191 CVE-2022-23527 |
| CWE-ID | CWE-601 CWE-330 CWE-79 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Fedora Operating systems & Components / Operating system mod_auth_openidc Operating systems & Components / Operating system package or component |
| Vendor | Fedoraproject |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Open redirect
EUVDB-ID: #VU79693
Risk: Low
CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-32786
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data in oidc_validate_redirect_url() function. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 39
mod_auth_openidc: before 2.4.12.3-2.fc39
External linkshttp://bodhi.fedoraproject.org/updates/FEDORA-2023-02c84fe305
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.
2) Use of insufficiently random values
EUVDB-ID: #VU79694
Risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-32791
CWE-ID:
CWE-330 - Use of Insufficiently Random Values
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a brute-force attack.
The vulnerability exists due to the AES GCM encryption in mod_auth_openidc uses a static IV and AAD, which creates a static nonce. Since aes-gcm is a stream cipher, this can lead to known cryptographic issues as the same key is being reused.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 39
mod_auth_openidc: before 2.4.12.3-2.fc39
External linkshttp://bodhi.fedoraproject.org/updates/FEDORA-2023-02c84fe305
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.
3) Cross-site scripting
EUVDB-ID: #VU55291
Risk: Low
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-32792
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within the "OIDCPreservePost On". A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 39
mod_auth_openidc: before 2.4.12.3-2.fc39
External linkshttp://bodhi.fedoraproject.org/updates/FEDORA-2023-02c84fe305
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.
4) Open redirect
EUVDB-ID: #VU71703
Risk: Low
CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-39191
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 39
mod_auth_openidc: before 2.4.12.3-2.fc39
External linkshttp://bodhi.fedoraproject.org/updates/FEDORA-2023-02c84fe305
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.
5) Open redirect
EUVDB-ID: #VU70325
Risk: Low
CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-23527
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data when providing a logout parameter to the redirect URI. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 39
mod_auth_openidc: before 2.4.12.3-2.fc39
External linkshttp://bodhi.fedoraproject.org/updates/FEDORA-2023-02c84fe305
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.
