CVE-2002-2295: Buffer overflow in Pico Server (pServ) 2.0 beta 1 through beta 5 allows remote attackers to cause a denial of

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HIGH 7.5DOWNGRADE

CVE-2002-2295 is a high-severity flaw (CVSS 7.5) affecting pico server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Pico Server (pServ) 2.0 beta 1 through beta 5 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via (1) a 1024-byte TCP stream message, which triggers an off-by-one buffer overflow, or (2) a long method name in an HTTP request, (3) a long version number in an HTTP request, (4) a long User-Agent header, or (5) a long file path.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	6.7% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: pico server

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

pico server pico server DOWNGRADE

Affected: 2.0_beta_1 · 2.0_beta_2 · 2.0_beta_3 · 2.0_beta_5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0_beta_1

1. Check installed version

apt-cache policy pico-server || rpm -q pico-server || pico-server --version

2. No fixed release: DOWNGRADE to a release before 2.0_beta_1 (Debian / Ubuntu)

apt-cache madison pico-server sudo apt install pico-server=<VERSION_BEFORE_2.0_beta_1> sudo apt-mark hold pico-server

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

dnf --showduplicates list pico-server sudo dnf downgrade pico-server-<VERSION_BEFORE_2.0_beta_1> sudo dnf versionlock add pico-server

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Pserv 2.0 - HTTP Version Specifier Buffer Overflow

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-2002-2295?

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

Is CVE-2002-2295 being exploited?

CVE-2002-2295 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-2002-2295 affect?

CVE-2002-2295 affects pico server. Severity is high (CVSS 7.5). Buffer overflow in Pico Server (pServ) 2.0 beta 1 through beta 5 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via (1) a 1024-byte TCP stream message, which triggers an off-by-one buffer ov

How urgent is CVE-2002-2295?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-1953 HIGH 7.5 DOWNGRADE Heap-based buffer overflow in the CGI extension for Pico Server (pServ) 3.3 allows remote attackers to execute
CVE-2005-1952 HIGH 7.5 DOWNGRADE Directory traversal vulnerability in Pico Server (pServ) 3.3 allows remote attackers to read arbitrary files a
CVE-2005-1367 HIGH 7.5 DOWNGRADE Pico Server (pServ) 3.2 and earlier allows local users to read arbitrary files as the pServ user via a symlink
CVE-2005-1366 HIGH 7.5 DOWNGRADE Pico Server (pServ) 3.2 and earlier allows remote attackers to obtain the source code for CGI scripts via "dir
CVE-2005-1365 HIGH 10.0 DOWNGRADE Pico Server (pServ) 3.2 and earlier allows remote attackers to execute arbitrary commands via a URL with multi

References

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