Openserver vulnerabilitiesRanked by how likely they are to be used.

Product14 versions
The short answer

Openserver is made by Sco. We track 72 published vulnerabilities listed under that exact name, across 14 versions. None of them is on the list of flaws known to be exploited today. Sco lists newer releases under their own names, such as Openserver Enterprise System, so check those pages too.

See the riskiest flaws

We keep watching the known-exploited list.

Other names

Is Openserver listed under other names? Yes.

Sco also lists Openserver under more specific names, such as Openserver Enterprise System and Openserver Network System. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.

Known exploited

Which Openserver vulnerabilities are being exploited?

This is the list that matters most: flaws criminals are using now.

None of Openserver's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which Openserver flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 95%

    Buffer overflow in login in various System V based operating systems allows remote attackers to execute arbitrary commands via a large number of arguments through services such as telnet and rlogin.

    CVSS10.0Published12 Dec 2001
  2. 75%

    Oversized ICMP ping packets can result in a denial of service, aka Ping o' Death.

    CVSS5.0Published18 Dec 1996
  3. 40%

    Buffer overflows in wuarchive ftpd (wu-ftpd) and ProFTPD lead to remote root access, a.k.a.

    CVSS10.0Published9 Feb 1999
  4. 21%

    Windows 95/NT out of band (OOB) data denial of service through NETBIOS port, aka WinNuke.

    CVSS5.0Published1 Jul 1997
  5. 10%

    The SSL/TLS handshaking code in OpenSSL 0.9.7a, 0.9.7b, and 0.9.7c, when using Kerberos ciphersuites, does not properly check the length of Kerberos tickets during a handshake, which allows remote attackers to cause...

    CVSS5.0Published23 Nov 2004
  6. 9.5%

    The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference.

    CVSS7.5Published23 Nov 2004
  7. 7.6%

    mod_digest_apple for Apache 1.3.31 and 1.3.32 on Mac OS X Server does not properly verify the nonce of a client response, which allows remote attackers to replay credentials.

    CVSS7.5Published3 Feb 2004
  8. 7.2%

    OpenSSL 0.9.6 before 0.9.6d does not properly handle unknown message types, which allows remote attackers to cause a denial of service (infinite loop), as demonstrated using the Codenomicon TLS Test Tool.

    CVSS5.0Published23 Nov 2004
  9. 5.5%

    Denial of Service vulnerabilities in BIND 4.9 and BIND 8 Releases via CNAME record and zone transfer.

    CVSS5.4Published8 Apr 1998
  10. 5.0%

    DNS cache poisoning via BIND, by predictable query IDs.

    CVSS5.0Published13 Aug 1997
Precursor Intelligence

Running Openserver? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

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FAQ

Common questions, answered plainly.

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We track 72 published vulnerabilities listed under the name Openserver, across 14 versions.

None of Openserver's vulnerabilities is on the list of flaws known to be exploited today.

Sco also lists Openserver under more specific names, such as Openserver Enterprise System and Openserver Network System. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.

Create a Precursor Intelligence account and track Openserver. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.