XFree86 X11r6 up to 4.3.0 ReadFontAlias/CopyISOLatin1Lowered memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
9.5 | $0-$5k | 0.00 |
A vulnerability has been found in XFree86 X11r6 up to 4.3.0 and classified as very critical. Affected by this vulnerability is the function ReadFontAlias/CopyISOLatin1Lowered
. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
Buffer overflow in the ReadFontAlias function in XFree86 4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function, allows local or remote authenticated users to execute arbitrary code via a malformed entry in the font alias (font.alias) file, a different vulnerability than CVE-2004-0083 and CVE-2004-0106.
The bug was discovered 02/12/2004. The weakness was presented 03/03/2004 by Greg MacManus as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. This vulnerability is known as CVE-2004-0084. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/07/2019).
The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 15280 (Debian DSA-443-1 : xfree86 - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.
Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (15200) and Tenable (15280). See 20848 and 21644 for similar entries.
Product
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 10.0VulDB Meta Temp Score: 9.5
VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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EPSS Percentile: 🔍
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0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 15280
Nessus Name: Debian DSA-443-1 : xfree86 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
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Nessus Context: 🔍
OpenVAS ID: 53680
OpenVAS Name: Debian Security Advisory DSA 443-1 (xfree86)
OpenVAS File: 🔍
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Timeline
02/12/2004 🔍02/12/2004 🔍
02/12/2004 🔍
02/19/2004 🔍
03/03/2004 🔍
03/03/2004 🔍
09/29/2004 🔍
07/24/2005 🔍
10/15/2014 🔍
06/07/2019 🔍
Sources
Advisory: kb.cert.orgResearcher: Greg MacManus
Status: Confirmed
CVE: CVE-2004-0084 (🔍)
OVAL: 🔍
X-Force: 15200
Vulnerability Center: 8639 - Buffer Overflow in XFree86 4.1.0 - 4.3.0 ReadFontAlias When Using CopyISOLatin1Lowered, Medium
SecurityFocus: 9652 - XFree86 CopyISOLatin1Lowered Font_Name Buffer Overflow Vulnerability
OSVDB: 8341 - XFree86 CopyISOLatin1Lowered buffer overflow
See also: 🔍
Entry
Created: 10/15/2014 15:11Updated: 06/07/2019 09:45
Changes: 10/15/2014 15:11 (72), 06/07/2019 09:45 (5)
Complete: 🔍
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