Integer underflow in libksba - CVE-2014-9087
Published: December 1, 2014 / Updated: July 28, 2020
Vulnerability identifier: #VU32456
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-9087
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Integer underflow in the ksba_oid_to_str function in Libksba before 1.3.2, as used in GnuPG, allows remote attackers to cause a denial of service (crash) via a crafted OID in a (1) S/MIME message or (2) ECC based OpenPGP data, which triggers a buffer overflow.
Affected software
libksba
libksba (Alpine package)
libksba
IBM Tivoli Storage Manager
Fedora
libksba (Alpine package)
libksba
IBM Tivoli Storage Manager
Fedora
How to mitigate CVE-2014-9087
Install update from vendor's website.
libksba (Alpine package) - update to 1.3.2-r0
libksba - update to 1.3.2-1.fc21
libksba - update to 1.3.2-1.fc21
External References
- http://advisories.mageia.org/MGASA-2014-0498.html
- http://lists.gnupg.org/pipermail/gnupg-announce/2014q4/000359.html
- http://secunia.com/advisories/60073
- http://secunia.com/advisories/60189
- http://secunia.com/advisories/60233
- http://www.debian.org/security/2014/dsa-3078
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:234
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:151
- http://www.securityfocus.com/bid/71285
- http://www.ubuntu.com/usn/USN-2427-1
- https://blog.fuzzing-project.org/2-Buffer-overflow-and-other-minor-issues-in-GnuPG-and-libksba-TFPA-0012014.html