CVE-2011-1843

Exp

Integer overflow in conf.c in Tinyproxy before 1.8.3 might allow remote attackers to bypass intended access restrictions in opportunistic circumstances via a TCP connection, related to improper handling of invalid port numbers.

Published: 2011-05-03 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1843 is rated Exploit Available (58.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.25%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1843

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-1843

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.55% 0.25% -0.30%
2 2024-12-17 0.50% 0.55% +0.06%
3 2023-03-07 — 0.50% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1843

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2011-1843

OS Trackers for CVE-2011-1843

vendor priority summary link
debian unimportant CVE-2011-1843 unimportant priority: Debian including 1 source packages (tinyproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1843
ubuntu medium CVE-2011-1843 medium priority: Ubuntu including 1 source packages (tinyproxy), 15 status rows across 15 suites (dapper, hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily): ignored 11, not-affected 3, released 1. https://ubuntu.com/security/CVE-2011-1843

Affected software / configurations for CVE-2011-1843

Vendor Product Version Raw CPE
banu tinyproxy <= 1.8.2 cpe:2.3:a:banu:tinyproxy:*:*:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:*:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre1:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre2:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre3:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre4:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre5:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:pre6:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc1:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc10:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc2:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc4:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc5:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc6:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc7:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc8:*:*:*:*:*:*
banu tinyproxy 1.5.0 cpe:2.3:a:banu:tinyproxy:1.5.0:rc9:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:*:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre1:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre2:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre3:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre4:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre5:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:pre6:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:rc1:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:rc2:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:rc3:*:*:*:*:*:*
banu tinyproxy 1.5.1 cpe:2.3:a:banu:tinyproxy:1.5.1:rc4:*:*:*:*:*:*
banu tinyproxy 1.5.2 cpe:2.3:a:banu:tinyproxy:1.5.2:*:*:*:*:*:*:*
banu tinyproxy 1.5.2 cpe:2.3:a:banu:tinyproxy:1.5.2:rc1:*:*:*:*:*:*
banu tinyproxy 1.5.2 cpe:2.3:a:banu:tinyproxy:1.5.2:rc2:*:*:*:*:*:*
banu tinyproxy 1.5.3 cpe:2.3:a:banu:tinyproxy:1.5.3:*:*:*:*:*:*:*
banu tinyproxy 1.5.3 cpe:2.3:a:banu:tinyproxy:1.5.3:rc1:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:*:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:a:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:pre1:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:pre2:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:pre3:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:pre4:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:rc1:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:rc2:*:*:*:*:*:*
banu tinyproxy 1.6.0 cpe:2.3:a:banu:tinyproxy:1.6.0:rc3:*:*:*:*:*:*
banu tinyproxy 1.6.1 cpe:2.3:a:banu:tinyproxy:1.6.1:*:*:*:*:*:*:*
banu tinyproxy 1.6.2 cpe:2.3:a:banu:tinyproxy:1.6.2:*:*:*:*:*:*:*
banu tinyproxy 1.6.3 cpe:2.3:a:banu:tinyproxy:1.6.3:*:*:*:*:*:*:*
banu tinyproxy 1.6.4 cpe:2.3:a:banu:tinyproxy:1.6.4:*:*:*:*:*:*:*
banu tinyproxy 1.6.5 cpe:2.3:a:banu:tinyproxy:1.6.5:*:*:*:*:*:*:*
banu tinyproxy 1.7.0 cpe:2.3:a:banu:tinyproxy:1.7.0:*:*:*:*:*:*:*
banu tinyproxy 1.7.1 cpe:2.3:a:banu:tinyproxy:1.7.1:*:*:*:*:*:*:*
banu tinyproxy 1.8.0 cpe:2.3:a:banu:tinyproxy:1.8.0:*:*:*:*:*:*:*
banu tinyproxy 1.8.1 cpe:2.3:a:banu:tinyproxy:1.8.1:*:*:*:*:*:*:*

References for CVE-2011-1843

cvelogic Threat Intelligence