CVE-2020-25494
published 2020-12-18CVE-2020-25494: Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels parameter to…
PriorityP184critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
39.19%
98.4th percentile
Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels parameter to cgi-bin/printbook.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| xinuos | openserver | — | — |
| xinuos | openserver | — | — |
Detection & IOCsextracted from sources · hover to see the quote
command|ping -n 21 127.0.0.1||`ping -c 21 127.0.0.1` #' |ping -n 21 127.0.0.1||`ping -c 21 127.0.0.1` #" |ping -n 21 127.0.0.1↗
otheroutputform=ps%7cping%20-n%2021%20127.0.0.1%7c%7c%60ping%20-c%2021%20127.0.0.1%60%20%23'%20%7cping%20-n%2021%20127.0.0.1%7c%7c%60ping%20-c%2021%20127.0.0.1%60%20%23%5c%22%20%7cping%20-n%2021%20127.0.0.1&booktitle=test&toclevels=3&part=%2Fen%2FOSR_FEATS%2FCONTENTS.html&part=%2Fen%2FUSE_oview%2FCONTENTS.↗
- →Monitor POST requests to /cgi-bin/printbook containing shell metacharacters (|, `, #, &) in the 'outputform' or 'toclevels' parameters, which indicate OS command injection attempts. ↗
- →Use the Google dork 'inurl:/cgi-bin/manlist?section' to identify exposed SCO Openserver instances on the internet. ↗
- →Alert on outbound DNS lookups (nslookup/dig) or ICMP ping traffic originating from the web server process (e.g., Apache/CGI child) as an indicator of successful out-of-band command injection. ↗
- →The vulnerable service runs on TCP port 8457 under Apache/1.3.33 with mod_perl/1.29. Fingerprint this server banner to identify exposed targets. ↗
- ·Both 'outputform' and 'toclevels' POST parameters are vulnerable; detection rules must cover both parameters, not just one. ↗
- ·Exploitation is confirmed on SCO Openserver 5.0.7 and version 6; other versions may also be affected. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vulncheck9.8CRITICAL
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GHSA
GHSA-6m4v-96f3-85ph: Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels paramete
ghsa_unreviewed·2022-05-24
CVE-2020-25494 [CRITICAL] CWE-88 GHSA-6m4v-96f3-85ph: Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels paramete
Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels parameter to cgi-bin/printbook.
VulnCheck
xinuos openserver Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
vulncheck·2020·CVSS 9.8
CVE-2020-25494 [CRITICAL] xinuos openserver Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
xinuos openserver Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Xinuos (formerly SCO) Openserver v5 and v6 allows attackers to execute arbitrary commands via shell metacharacters in outputform or toclevels parameter to cgi-bin/printbook.
Affected: xinuos openserver
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://blog.talosintelligence.com/2021/06/necro-python-bot-adds-new-tricks.html; https://blogs.juniper.net/en-us/threat-research/necro-python-botnet-goes-after-vulnerable-visualtools-dvr; https://heimdalsecurity.com/blog/vulnerable-video-dvr-devices-now-targeted-by-the-freakout-botnet/
No detection rules found.
Unit42
Network Security Trends: May-July 2021
blogs_unit42·2021-09-17
Network Security Trends: May-July 2021
## Executive Summary
Unit 42 researchers continue to observe network security trends, tracking how cybercriminals take advantage of vulnerabilities in the real world. The following sections present our analysis of the most recently published vulnerabilities, including their severity and category distribution. Additionally, we provide insight into how the vulnerabilities are exploited in the wild based on real-world data collected from Palo Alto Networks Next-Generation Firewalls. We highlight vulnerabilities ranked medium severity and above that were newly published from May-July 2021 in order to raise awareness of their active exploits in the wild. We then draw conclusions about the most commonly exploited vulnerabilities we observed attackers using, as well as the severity, category and
Unit42
Network Security Trends: May-July 2021
blogs_unit42·2021-09-17
Network Security Trends: May-July 2021
Threat Research Center
Trend Reports
Vulnerabilities
## Network Security Trends: May-July 2021
Yue Guan
Lei Xu
Published: September 17, 2021
Malware
Trend Reports
Vulnerabilities
Attack analysis
Exploit
Exploit in the wild
Network security trends
## Executive Summary
Unit 42 researchers continue to observe network security trends, tracking how cybercriminals take advantage of vulnerabilities in the real world. The following sections present our analysis of the most recently published vulnerabilities, including their severity and category distribution. Additionally, we provide insight into how the vulnerabilities are exploited in the wild based on real-world data collected from Palo Alto Networks Next-Generation Firewalls . We highlight vulnerabilities ranked medium sever
Greynoiseio
Malicious Tag Roundup (Jun 7-18, 2021)
blogs_greynoiseio·CVSS 9.8
[CRITICAL] Malicious Tag Roundup (Jun 7-18, 2021)
CVE Disclosure Early Warning Get an early warning when traffic spikes indicate a high likelihood of new disclosures
Compromised Asset Detection Find out immediately if an asset communicates with a malicious IP address
Vulnerability Prioritization Get real-time insight into active exploitation trends to better understand risk and severity
SOC Efficiency Filter out noisy, low priority and false-positive alerts from mass internet scanners
Incident Investigation Add context to incidents to speed the determinations of scope and timelines
Threat Hunting Quickly identify anomalous behavior and enrich your threat hunting campaigns
Why GreyNoise
CVE Disclosure Early Warning Get an early warning when traffic spikes indicate a high likelihood of new disclosures
Compromised Asset Detection Fin
http://packetstormsecurity.com/files/160635/SCO-Openserver-5.0.7-Command-Injection.htmlhttps://github.com/Ramikan/Vulnerabilities/blob/master/SCO%20Openserver%20OS%20Command%20Injection%20Vulnerabilityhttp://packetstormsecurity.com/files/160635/SCO-Openserver-5.0.7-Command-Injection.htmlhttps://github.com/Ramikan/Vulnerabilities/blob/master/SCO%20Openserver%20OS%20Command%20Injection%20Vulnerability
2020-12-18
Published
Exploited in the wild