Gentoo update for libtasn1



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2015-2806
CVE-2015-3622
CWE-ID CWE-121
CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU1590

Risk: Low

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-2806

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The weakness exists due to stack-based buffer overflow in asn1_der_decoding. A remote attacker can trigger memory corruption and have unspecified impact on the system.

Mitigation

Update the affected packages.
dev-libs/libtasn1 to version: 1.4.5

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201509-04


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.

2) Out-of-bounds read

EUVDB-ID: #VU7690

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 - Out-of-bounds read

Exploit availability: No

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 the affected packages.
dev-libs/libtasn1 to version: 1.4.5

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/glsa/201509-04


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.



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