Amazon Linux AMI update for python-crypto

1) Buffer overflow

EUVDB-ID: #VU39653

Risk: High

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:Amber]

CVE-ID: CVE-2013-7459

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Heap-based buffer overflow in the ALGnew function in block_templace.c in Python Cryptography Toolkit (aka pycrypto) allows remote attackers to execute arbitrary code as demonstrated by a crafted iv parameter to cryptmsg.py.

Mitigation

Update the affected packages:

i686:
    python26-crypto-2.6.1-1.14.amzn1.i686
    python-crypto-debuginfo-2.6.1-1.14.amzn1.i686
    python27-crypto-2.6.1-1.14.amzn1.i686

src:
    python-crypto-2.6.1-1.14.amzn1.src

x86_64:
    python26-crypto-2.6.1-1.14.amzn1.x86_64
    python27-crypto-2.6.1-1.14.amzn1.x86_64
    python-crypto-debuginfo-2.6.1-1.14.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2017-801.html

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.