CVE-2009-5155
Public exploit available. Not confirmed exploited in the wild yet. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
4 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
3.9% chance of exploitation activity in the next 30 days, which ranks it in the 90th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
The patch came 471 days before any public exploit.
- OpenVAS check added
- Public exploit / PoCsource: other
- Patch availablerecord updated
- Publishedweakness classified
Affected products
- BIG-IQ Centralized ManagementNetworking Infrastructure / network-management
- BIG-IP Access Policy ManagerNetworking Infrastructure / firewall
- BIG-IP Advanced Firewall ManagerSecurity Products
- BIG-IP AnalyticsNetworking Infrastructure / network-management
- BIG-IP Application Acceleration ManagerNetworking Infrastructure / load-balancer-proxy
- BIG-IP Application Security ManagerNetworking Infrastructure / firewall
- BIG-IP DNSNetworking Infrastructure / dns-dhcp-ntp
- BIG-IP Fraud Protection ServiceNetworking Infrastructure / firewall
And 11 more affected products. See all after sign-in
Technical detail
CVSS 3.0 vector
Open in the CVSS calculatorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
References in the record
- sourceware.org/bugzilla/show_bug.cgi?id=11053&
- debbugs.gnu.org/cgi/bugreport.cgi?bug=22793&
- sourceware.org/bugzilla/show_bug.cgi?id=18986&
And 23 more references. See all after sign-in
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