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CVE-2001-0843

20
FAUCET Score

CVE-2001-0843 describes a denial-of-service vulnerability in Squid proxy server versions 2.4 and earlier, where a remote attacker can crash the server by sending a malformed FTP PUT request that only specifies a directory creation. This vulnerability has a CVSS score of 5.0 (Medium), indicating it can be exploited remotely with low complexity to cause a partial denial of service, requiring no authentication. While there is no known active exploitation, public exploit code, or Metasploit/Nuclei modules, the vulnerability has garnered significant community discussion with 10 mentions, suggesting some level of awareness or interest.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4CPE matchmatch criteria
cpe:2.3:a:squid:squid_web_proxy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.85%
Probability of exploitation in next 30 days
EPSS Percentile
85.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0285 is in the 79th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Linux 6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.2
View patch

Vendor Advisories (1)

redhatCVE-2001-0843

security flaw

Sep 21, 2001

References

archives.neohapsis.com / archives/linux/conectiva/2001-q3/0020.html
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/7157
debian.org / security/2001/dsa-077
linux-mandrake.com / en/security/2001/MDKSA-2001-088.php3
novell.com / linux/security/advisories/2001_037_squid_txt.html
redhat.com / support/errata/RHSA-2001-113.html
PatchVendor Advisory
securityfocus.com / bid/3354