Multiple vulnerabilities in Tenable.sc
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-23943 CVE-2022-0778 |
| CWE-ID | CWE-787 CWE-835 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
Tenable.sc Server applications / DLP, anti-spam, sniffers |
| Vendor | Tenable Network Security |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds write
EUVDB-ID: #VU61284
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2022-23943
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in mod_sed. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.
MitigationInstall update from vendor's website.
Vulnerable software versionsTenable.sc: Patch 202110.1 - 5.20.1
CPE2.3- cpe:2.3:a:tenable_network_security:tenable.sc:Patch 202110.1:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:tenable.sc:Patch 202201.1:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:tenable.sc:5.19.0:*:*:*:*:*:*:*
https://www.tenable.com/security/tns-2022-08
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) Infinite loop
EUVDB-ID: #VU61391
Risk: Medium
CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2022-0778
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the BN_mod_sqrt() function when processing an ASN.1 certificate that contains elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. A remote attacker can supply a specially crafted certificate to the TLS server or client, consume all available system resources and cause denial of service conditions.
MitigationInstall update from vendor's website.
Vulnerable software versionsTenable.sc: Patch 202110.1 - 5.20.1
CPE2.3- cpe:2.3:a:tenable_network_security:tenable.sc:Patch 202110.1:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:tenable.sc:Patch 202201.1:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:tenable.sc:5.19.0:*:*:*:*:*:*:*
https://www.tenable.com/security/tns-2022-08
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. However, proof of concept for this vulnerability is available.
