CVE-2015-3310: Buffer overflow in the rc_mksid function in plugins/radius/util.c in Paul's PPP Package (ppp) 2.4.6 and earlie

Q: How do I fix CVE-2015-3310?

ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; point-to-point protocol: upgrade to newer than 2.4.6. Exact commands for each OS are on this page.

Q: Is CVE-2015-3310 being exploited?

CVE-2015-3310 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-2015-3310 affect?

CVE-2015-3310 affects ubuntu linux, debian linux, point-to-point protocol. Severity is medium (CVSS 4.3). Buffer overflow in the rc_mksid function in plugins/radius/util.c in Paul's PPP Package (ppp) 2.4.6 and earlier, when the PID for pppd is greater than 65535, allows remote attackers to cause a denial of service (crash) via a start accountin

Q: How urgent is CVE-2015-3310?

Priority 43/100. EPSS top 7%: very likely to be exploited; On your watchlist

This month

MEDIUM 4.3WATCHLISTMITIGATEMITIGATEUPGRADE

CVE-2015-3310 is a medium-severity flaw (CVSS 4.3) affecting ubuntu linux, debian linux, point-to-point protocol. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the rc_mksid function in plugins/radius/util.c in Paul's PPP Package (ppp) 2.4.6 and earlier, when the PID for pppd is greater than 65535, allows remote attackers to cause a denial of service (crash) via a start accounting message to the RADIUS server.

Why this priority

EPSS top 7%: very likely to be exploited
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	5.4% (top 7%)
CISA exploited list	No
Weakness	CWE-119
Published	2015-04-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: canonical · debian · point-to-point protocol project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-04-24 14:59 UTCPublished CVE record published
2026-06-17 00:25 UTCUpdated Record last modified

canonical ubuntu linux MITIGATE

Affected: 12.04 · 14.04 · 14.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.04

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.

debian debian linux MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

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.

point-to-point protocol project point-to-point protocol UPGRADE

Affected: <= 2.4.6

Fixed in: newer than 2.4.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy point-to-point-protocol || rpm -q point-to-point-protocol || point-to-point-protocol --version

2. UPGRADE to newer than 2.4.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade point-to-point-protocol

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade point-to-point-protocol

Note

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

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-2015-3310?

ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; point-to-point protocol: upgrade to newer than 2.4.6. Exact commands for each OS are on this page.

Is CVE-2015-3310 being exploited?

CVE-2015-3310 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-2015-3310 affect?

CVE-2015-3310 affects ubuntu linux, debian linux, point-to-point protocol. Severity is medium (CVSS 4.3). Buffer overflow in the rc_mksid function in plugins/radius/util.c in Paul's PPP Package (ppp) 2.4.6 and earlier, when the PID for pppd is greater than 65535, allows remote attackers to cause a denial of service (crash) via a start accountin

How urgent is CVE-2015-3310?

Priority 43/100. EPSS top 7%: very likely to be exploited; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities

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References

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