Buffer overflow in GNU C Library (glibc) - CVE-2014-6040
Published: December 5, 2014 / Updated: August 9, 2020
Vulnerability identifier: #VU41035
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-6040
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
GNU C Library (aka glibc) before 2.20 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via a multibyte character value of "0xffff" to the iconv function when converting (1) IBM933, (2) IBM935, (3) IBM937, (4) IBM939, or (5) IBM1364 encoded data to UTF-8.
Affected software
GNU C Library (glibc)
Gentoo Linux
Slackware Linux
glibc
glibc-i18n
glibc-profile
glibc-solibs
sys-libs/glibc
Gentoo Linux
Slackware Linux
glibc
glibc-i18n
glibc-profile
glibc-solibs
sys-libs/glibc
How to mitigate CVE-2014-6040
Install update from vendor's website.
glibc - update to 2.17
glibc-i18n - update to 2.17
glibc-profile - update to 2.17
glibc-solibs - update to 2.17
sys-libs/glibc - update to 2.21-r2
glibc-i18n - update to 2.17
glibc-profile - update to 2.17
glibc-solibs - update to 2.17
sys-libs/glibc - update to 2.21-r2
External References
- http://linux.oracle.com/errata/ELSA-2015-0016.html
- http://secunia.com/advisories/62100
- http://secunia.com/advisories/62146
- http://ubuntu.com/usn/usn-2432-1
- http://www.debian.org/security/2015/dsa-3142
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:175
- http://www.openwall.com/lists/oss-security/2014/08/29/3
- http://www.openwall.com/lists/oss-security/2014/09/02/1
- http://www.securityfocus.com/bid/69472
- https://security.gentoo.org/glsa/201602-02
- https://sourceware.org/bugzilla/show_bug.cgi?id=17325
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=41488498b6