CVE-2011-5268: connection.c in Bip before 0.8.9 does not properly close sockets, which allows remote attackers to cause a den

Q: How do I fix CVE-2011-5268?

bip: upgrade to newer than 0.8.8; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-5268 being exploited?

CVE-2011-5268 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-2011-5268 affect?

CVE-2011-5268 affects bip, fedora. Severity is medium (CVSS 4.3). connection.c in Bip before 0.8.9 does not properly close sockets, which allows remote attackers to cause a denial of service (file descriptor consumption and crash) via multiple failed SSL handshakes, a different vulnerability than CVE-2013

Q: How urgent is CVE-2011-5268?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADEMITIGATE

CVE-2011-5268 is a medium-severity flaw (CVSS 4.3) affecting bip, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

connection.c in Bip before 0.8.9 does not properly close sockets, which allows remote attackers to cause a denial of service (file descriptor consumption and crash) via multiple failed SSL handshakes, a different vulnerability than CVE-2013-4550. NOTE: this issue was SPLIT from CVE-2013-4550 because it is a different type of issue.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-310
Published	2013-12-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: duckcorp · fedoraproject

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

Am I affected?

Timeline

2013-12-24 19:55 UTCPublished CVE record published
2026-06-16 23:36 UTCUpdated Record last modified

duckcorp bip UPGRADE

Affected: <= 0.8.8 · 0.8.0 · 0.8.0 rc0 · 0.8.0 rc1 · 0.8.1 · 0.8.2 · 0.8.3 · 0.8.4

Fixed in: newer than 0.8.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.8.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bip

Note

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

fedoraproject fedora MITIGATE

Affected: 18 · 19 · 20

Fixed in: no fixed release known

Safe to downgrade to: a release before 18

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-2011-5268?

bip: upgrade to newer than 0.8.8; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-5268 being exploited?

CVE-2011-5268 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-2011-5268 affect?

CVE-2011-5268 affects bip, fedora. Severity is medium (CVSS 4.3). connection.c in Bip before 0.8.9 does not properly close sockets, which allows remote attackers to cause a denial of service (file descriptor consumption and crash) via multiple failed SSL handshakes, a different vulnerability than CVE-2013

How urgent is CVE-2011-5268?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2013-4550 MEDIUM 5.1 MITIGATE UPGRADE Bip before 0.8.9, when running as a daemon, writes SSL handshake errors to an unexpected file descriptor that
CVE-2012-0806 MEDIUM 6.5 UPGRADE Buffer overflow in Bip 0.8.8 and earlier might allow remote authenticated users to execute arbitrary code via
CVE-2010-3071 MEDIUM 5.0 UPGRADE bip before 0.8.6 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon cra

References

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