CVE-2013-4238 describes a vulnerability in the ssl.match_hostname function within Python versions 2.6 through 3.4, where a null character in the Subject Alternative Name field of an X.509 certificate is mishandled. This flaw allows man-in-the-middle attackers to spoof SSL servers using specially crafted certificates from legitimate Certificate Authorities, affecting various Canonical, openSUSE, and Python distributions. The vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity, requiring no authentication, and resulting in partial integrity impact. There is no evidence of active exploitation, publicly available exploit code in Metasploit, Nuclei, or ExploitDB, and it is not listed in CISA's KEV catalog, with minimal community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
10.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:10.04:-:lts:*:*:*:*:* | ||
2.6.1CPE matchmatch criteria | cpe:2.3:a:python:python:2.6.1:*:*:*:*:*:*:* | ||
2.6.2CPE matchmatch criteria | cpe:2.3:a:python:python:2.6.2:*:*:*:*:*:*:* | ||
2.6.3CPE matchmatch criteria | cpe:2.3:a:python:python:2.6.3:*:*:*:*:*:*:* | ||
2.6.4CPE matchmatch criteria | cpe:2.3:a:python:python:2.6.4:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:N
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.