#VU7690 Out-of-bounds read in libtASN1 - CVE-2015-3622

Vulnerability identifier: #VU7690

Vulnerability risk: Low

CVSSv4.0: 2.7 [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/E:U/U:Clear]

CVE-ID: CVE-2015-3622

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libtASN1
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description
The vulnerability allows a remote attacker to cause DoS conditions on the target system.

The weakness exists due to an error in the _asn1_extract_der_octet function in lib/decoding.c. A remote attacker can send a specially crafted certificate, trigger out-of-bounds heap read and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 4.5 or later.

Vulnerable software versions

libtASN1: 0.1.0 - 4.4

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External links
https://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commit;h=4d4f992826a4962790ecd0cce6fbba4a415ce149

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.