CVE-2002-2367: Off-by-one buffer overflow in NEC SOCKS5 1.0 r11 and earlier allows remote attackers to cause a denial of serv

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HIGH 7.8DOWNGRADE

CVE-2002-2367 is a high-severity flaw (CVSS 7.8) affecting socks5. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Off-by-one buffer overflow in NEC SOCKS5 1.0 r11 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long hostname.

Why this priority

High severity
EPSS top 7%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	5.4% (top 7%)
CISA exploited list	No
Weakness	CWE-119, CWE-189
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: socks5

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

socks5 socks5 DOWNGRADE

Affected: 1.0_r11

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0_r11

1. Check installed version

apt-cache policy socks5 || rpm -q socks5 || socks5 --version

2. No fixed release: DOWNGRADE to a release before 1.0_r11 (Debian / Ubuntu)

apt-cache madison socks5 sudo apt install socks5=<VERSION_BEFORE_1.0_r11> sudo apt-mark hold socks5

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list socks5 sudo dnf downgrade socks5-<VERSION_BEFORE_1.0_r11> sudo dnf versionlock add socks5

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2002-2367?

socks5: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-2367 being exploited?

CVE-2002-2367 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-2002-2367 affect?

CVE-2002-2367 affects socks5. Severity is high (CVSS 7.8). Off-by-one buffer overflow in NEC SOCKS5 1.0 r11 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long hostname.

How urgent is CVE-2002-2367?

Priority 55/100. High severity; EPSS top 7%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2013-10005 HIGH 7.5 UPGRADE The RemoteAddr and LocalAddr methods on the returned net.Conn may call themselves, leading to an infinite loop

References

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