CVE-2006-6811
CVE-2006-6811 is a medium-severity vulnerability in Kde Ksirc with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-617.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v2: 4.3
- EPSS exploit prediction: 10% (95th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-617
- Affected product: Kde Ksirc
- Published:
- Last modified:
Description
KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.
Frequently asked questions
- What is CVE-2006-6811?
- KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.
- How severe is CVE-2006-6811?
- CVE-2006-6811 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2006-6811 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2006-6811?
- CVE-2006-6811 primarily affects Kde Ksirc. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2006-6811?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2006-6811 published?
- CVE-2006-6811 was published on 2006-12-29 and last updated on 2026-06-16.
References
- http://osvdb.org/33443
- http://security.gentoo.org/glsa/glsa-200701-26.xml
- http://securitytracker.com/id?1017453
- http://www.addict3d.org/index.php?page=viewarticle&trace=0&type=security&ID=8468
- http://www.kde.org/info/security/advisory-20070109-1.txt
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:009
- http://www.securityfocus.com/archive/1/456379/100/0/threaded
- http://www.securityfocus.com/bid/21790
- http://www.ubuntu.com/usn/usn-409-1
- http://www.vupen.com/english/advisories/2006/5199
- https://exchange.xforce.ibmcloud.com/vulnerabilities/31134
- https://issues.rpath.com/browse/RPL-922
- https://www.exploit-db.com/exploits/3023
Affected products (4)
- cpe:2.3:a:kde:ksirc:1.3.12:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:5.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:6.10:*:*:*:*:*:*:*
Other CWE-617 (Reachable Assertion) vulnerabilities
- CVE-2020-3615 — Critical (CVSS 9.8): Valid deauth/disassoc frames is dropped in case if RMF is enabled and some rouge peer keep on sending rogue…
- CVE-2019-9795 — Critical (CVSS 9.8): A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by…
- CVE-2026-31739 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - Add missing CRYPTO_ALG_ASYNC The…
- CVE-2020-12417 — High (CVSS 8.8): Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in…
- CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
- CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.