CVE-2011-1499: acl.c in Tinyproxy before 1.8.3, when an Allow configuration setting specifies a CIDR block, permits TCP conne

Q: How do I fix CVE-2011-1499?

tinyproxy: upgrade to newer than 1.8.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-1499 being exploited?

CVE-2011-1499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-1499 affect?

CVE-2011-1499 affects tinyproxy, debian linux. Severity is low (CVSS 2.6). acl.c in Tinyproxy before 1.8.3, when an Allow configuration setting specifies a CIDR block, permits TCP connections from all IP addresses, which makes it easier for remote attackers to hide the origin of web traffic by leveraging the open

Q: How urgent is CVE-2011-1499?

Priority 34/100. On your watchlist

Routine

LOW 2.6WATCHLISTUPGRADEMITIGATE

CVE-2011-1499 is a low-severity flaw (CVSS 2.6) affecting tinyproxy, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

acl.c in Tinyproxy before 1.8.3, when an Allow configuration setting specifies a CIDR block, permits TCP connections from all IP addresses, which makes it easier for remote attackers to hide the origin of web traffic by leveraging the open HTTP proxy server.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-16
Published	2011-04-29
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: banu · debian

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-04-29 22:55 UTCPublished CVE record published
2026-06-16 23:29 UTCUpdated Record last modified

banu tinyproxy UPGRADE

Affected: <= 1.8.2 · 1.5.0 · 1.5.0 pre1 · 1.5.0 pre2 · 1.5.0 pre3 · 1.5.0 pre4 · 1.5.0 pre5 · 1.5.0 pre6

Fixed in: newer than 1.8.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tinyproxy || rpm -q tinyproxy || tinyproxy --version

2. UPGRADE to newer than 1.8.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tinyproxy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tinyproxy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-1499?

tinyproxy: upgrade to newer than 1.8.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-1499 being exploited?

CVE-2011-1499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-1499 affect?

CVE-2011-1499 affects tinyproxy, debian linux. Severity is low (CVSS 2.6). acl.c in Tinyproxy before 1.8.3, when an Allow configuration setting specifies a CIDR block, permits TCP connections from all IP addresses, which makes it easier for remote attackers to hide the origin of web traffic by leveraging the open

How urgent is CVE-2011-1499?

Priority 34/100. On your watchlist

Software pages

Debian vulnerabilities

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References

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