How severe is CVE-2011-1843?

CVE-2011-1843 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-1843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1843?

CVE-2011-1843 primarily affects Banu Tinyproxy. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1843 published?

CVE-2011-1843 was published on 2011-05-03 and last updated on 2026-06-16.

CVE-2011-1843

CVE-2011-1843 is a medium-severity vulnerability in Banu Tinyproxy with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Banu Tinyproxy
Published: 2011-05-03
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2011-1843?: 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.
How severe is CVE-2011-1843?: CVE-2011-1843 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-1843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1843?: CVE-2011-1843 primarily affects Banu Tinyproxy. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1843 published?: CVE-2011-1843 was published on 2011-05-03 and last updated on 2026-06-16.

References

Affected products (51)

cpe:2.3:a:banu:tinyproxy:*:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre3:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre4:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre5:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:pre6:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc10:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc4:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc5:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc6:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc7:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc8:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.0:rc9:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre3:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre4:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre5:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:pre6:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:rc1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:rc2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:rc3:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.1:rc4:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.2:rc1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.2:rc2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.5.3:rc1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:a:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:pre1:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:pre2:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:pre3:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:pre4:*:*:*:*:*:*
cpe:2.3:a:banu:tinyproxy:1.6.0:rc1:*:*:*:*:*:*

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