Input validation error in Glibc - CVE-2013-7423
Published: September 1, 2021 / Updated: June 3, 2025
Vulnerability identifier: #VU110110
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2013-7423
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Glibc
Glibc
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to corrupt data.
The send_dg function in resolv/res_send.c in GNU C Library (aka glibc or libc6) before 2.20 does not properly reuse file descriptors, which allows remote attackers to send DNS queries to unintended locations via a large number of requests that trigger a call to the getaddrinfo function.
How to mitigate CVE-2013-7423
Install update from vendor's website.
Sources
- http://www.openwall.com/lists/oss-security/2015/01/28/20
- https://github.com/golang/go/issues/6336
- http://lists.opensuse.org/opensuse-updates/2015-02/msg00089.html
- https://sourceware.org/bugzilla/show_bug.cgi?id=15946
- http://www.ubuntu.com/usn/USN-2519-1
- http://www.securityfocus.com/bid/72844
- https://security.gentoo.org/glsa/201602-02
- https://access.redhat.com/errata/RHSA-2016:1207
- http://rhn.redhat.com/errata/RHSA-2015-0863.html
- http://seclists.org/fulldisclosure/2021/Sep/0
- http://packetstormsecurity.com/files/164014/Moxa-Command-Injection-Cross-Site-Scripting-Vulnerable-Software.html