Ubuntu.comUB:CVE-2018-18584CVE-2018-18584
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.345 Low
EPSS
Percentile
97.0%
In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the
CAB block input buffer is one byte too small for the maximal Quantum block,
leading to an out-of-bounds write.
Bugs
Notes
| Author | Note |
|---|---|
| alexmurray | We released clamav 0.100.2+dfsg-1ubuntu0.1X.04.2 for precise/esm and trusty, but subsequently were notified the bundled libmspack is not actually vulnerable in this case, as the version of libmspack provided had increased the CAB_BLOCKMAX macro to 65535, meaning that CAB_INPUTMAX is now 71679, which is impossible to encode in the 16-bit cfdata_CompressedSize field of a single block. |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 14.04 | noarch | cabextract | < 1.4-4ubuntu0.1~esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 14.04 | noarch | clamav | < 0.100.2+dfsg-1ubuntu0.14.04.2 | UNKNOWN |
| ubuntu | 18.04 | noarch | libmspack | < 0.6-3ubuntu0.2 | UNKNOWN |
| ubuntu | 18.10 | noarch | libmspack | < 0.7-1ubuntu0.1 | UNKNOWN |
| ubuntu | 14.04 | noarch | libmspack | < 0.4-1ubuntu0.1~esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | libmspack | < 0.5-1ubuntu0.16.04.3 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2018-18584
nvd.nist.gov/vuln/detail/CVE-2018-18584
security-tracker.debian.org/tracker/CVE-2018-18584
ubuntu.com/security/notices/USN-3814-1
ubuntu.com/security/notices/USN-3814-2
ubuntu.com/security/notices/USN-3814-3
www.cabextract.org.uk/#changes
www.cve.org/CVERecord?id=CVE-2018-18584
www.openwall.com/lists/oss-security/2018/10/22/1
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.345 Low
EPSS
Percentile
97.0%