On Sun, 8 Mar 2026 03:57:45 +0100, Solar Designer wrote: others have. It may well be that allowing those other env vars by and maybe allowing LANG and LC is desirable for current use cases. LANG and LC were cargo-culted in as they are honoured by OpenSSHd. Separately note that I didn't check the BSDs telnet client (which I think is still present in all BSDs) for being (hopefully not) willing And you could want to check the telnet client in InetUtils, now that we know this package missed telnet[d] security fixes in general. This was CVE-2005-0488 (and CVE-2005-1205 on Windows).

"Certain BSD-based Telnet clients, including those used on Solaris and SuSE Linux, allow remote malicious Telnet servers to read sensitive command."

The daemon now clears the inherited environment (preserving PATH and TERM, respectively, if present) before calling telnetdsetup(). LDPRELOAD=/lib64/libhardenedmalloc.so (although /etc/ld.so.preload is a more reliable way to do this when practical to do it globally).

exorciseenv() and leave the inetd/tcpd supplied environment intact for telnetd (or some site-specific wrapper) to inherit. +++ b/telnetd/state.c @@ -1495,10 +1495,18 @@ suboption (void) case NEWENVVAR: case ENVUSERVAR: ... } / end of case TELOPTNEWENVIRON /

Some code duplication here. Not new with these changes, but could be worth moving to a new function e.g. setenvvarifallowed(). Agreed. I'll implement setenvvarifallowed() instead. +/ A default whitelist for environment variables. / +static const char allowedenvvars[] = { + "USER", + "LOGNAME", + "TERM", + "LANG", + "LC", + NULL +};

Can make not only the strings but also the pointers const:

static const char const allowedenvvars[] = {

so that both may end up in a read-only section. OK, .rodata it is. +int +isenvvarallowed (const char var, const char val) +{ + const char p; + int allowed = 0; + + for (p = allowedenvvars; p; p++) + { + if (fnmatch (p, var, FNMNOESCAPE) == 0) + { + allowed = 1; + break; + } + } + + if (!allowed) + return 0;

You didn't strictly need the "allowed" variable, you could check p after the loop. But maybe it's more readable the way you wrote it. I'll keep "allowed" for the time being, but I don't mind changing it if there's a clearer way to express this logic. My review above isn't in full context - I only looked at the patches.

Sunnet eHRD e-mail delivery task schedule’s serialization function has inadequate input object validation and restriction, which allows a post-authenticated remote attacker with database access privilege, to execute arbitrary code and control the system or interrupt services.

Sunnet eHRD has broken access control vulnerability, which allows a remote attacker to access account management page after being authenticated as a general user, then perform privilege escalation to execute arbitrary code and control the system or interrupt services.

Sunnet eHRD has inadequate filtering for special characters in URLs, which allows a remote attacker to perform path traversal attacks without authentication, access restricted paths and download system files.

Sunnet eHRD, a human training and development management system, contains a vulnerability of Broken Access Control. After login, attackers can use a specific URL, access unauthorized functionality and data.

Sunnet eHRD, a human training and development management system, contains vulnerability of Cross-Site Scripting (XSS), attackers can inject arbitrary command into the system and launch XSS attack.

Sunnet eHRD, a human training and development management system, improperly stores system files. Attackers can use a specific URL and capture confidential information.

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.<br>This update upgrades Oracle Java SE 6 to version 6 Update 211.<br>Security Fix(es):<br><li> OpenJDK: Incomplete enforcement of the trustURLCodebase restriction (JNDI, 8199177) (CVE-2018-3149)</li> <li> Oracle JDK: unspecified vulnerability fixed in 6u201, 7u191, 8u181, and 10.0.2 (Libraries) (CVE-2018-2940)</li> <li> OpenJDK: insufficient index validation in PatternSyntaxException getMessage() (Concurrency, 8199547) (CVE-2018-2952)</li> <li> Oracle JDK: unspecified vulnerability fixed in 6u201, 7u191, 8u181, and 10.0.2 (JSSE) (CVE-2018-2973)</li> <li> OpenJDK: Incorrect handling of unsigned attributes in signed Jar manifests (Security, 8194534) (CVE-2018-3136)</li> <li> OpenJDK: Leak of sensitive header data via HTTP redirect (Networking, 8196902) (CVE-2018-3139)</li> <li> OpenJDK: Missing endpoint identification algorithm check during TLS session resumption (JSSE, 8202613) (CVE-2018-3180)</li> <li> OpenJDK: Infinite loop in RIFF format reader (Sound, 8205361) (CVE-2018-3214)</li> <li> libpng: Integer overflow and resultant divide-by-zero in pngrutil.c:pngcheckchunklength() allows for denial of service (CVE-2018-13785)</li> For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.<br>This update upgrades Oracle Java SE 6 to version 6 Update 191.<br>Security Fix(es):<br><li> OpenJDK: incorrect handling of Reference clones can lead to sandbox bypass (Hotspot, 8192025) (CVE-2018-2814)</li> <li> OpenJDK: unrestricted deserialization of data from JCEKS key stores (Security, 8189997) (CVE-2018-2794)</li> <li> Oracle JDK: unspecified vulnerability fixed in 6u191, 7u171, and 8u161 (Security) (CVE-2018-2783)</li> <li> OpenJDK: insufficient consistency checks in deserialization of multiple classes (Security, 8189977) (CVE-2018-2795)</li> <li> OpenJDK: unbounded memory allocation during deserialization in TabularDataSupport (JMX, 8189985) (CVE-2018-2797)</li> <li> OpenJDK: unbounded memory allocation during deserialization in Container (AWT, 8189989) (CVE-2018-2798)</li> <li> OpenJDK: RMI HTTP transport enabled by default (RMI, 8193833) (CVE-2018-2800)</li> <li> OpenJDK: unbounded memory allocation during deserialization in StubIORImpl (Serialization, 8192757) (CVE-2018-2815)</li> <li> OpenJDK: incorrect merging of sections in the JAR manifest (Security, 8189969) (CVE-2018-2790)</li> For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.<br>This update upgrades Oracle Java SE 6 to version 6 Update 171.<br>Security Fix(es):<br><li> This update fixes multiple vulnerabilities in the Oracle Java Runtime Environment and the Oracle Java Software Development Kit. Further information about these flaws can be found on the Oracle Java SE Critical Patch Update Advisory page listed in the References section. (CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843, CVE-2017-10274, CVE-2017-10281, CVE-2017-10285, CVE-2017-10293, CVE-2017-10295, CVE-2017-10345, CVE-2017-10346, CVE-2017-10347, CVE-2017-10348, CVE-2017-10349, CVE-2017-10355, CVE-2017-10356, CVE-2017-10357, CVE-2017-10388)</li> Note: Starting with this update, Java web browser plugin and Java Web Start application are no longer included with Oracle Java SE 6. Refer to the Releases Notes and the Oracle Java SE Support Roadmap pages linked to in the References section for further information about this change.

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.<br>This update upgrades Oracle Java SE 6 to version 6 Update 161.<br>Security Fix(es):<br><li> This update fixes multiple vulnerabilities in the Oracle Java Runtime Environment and the Oracle Java Software Development Kit. Further information about these flaws can be found on the Oracle Java SE Critical Patch Update Advisory page, listed in the References section. (CVE-2017-10053, CVE-2017-10067, CVE-2017-10074, CVE-2017-10081, CVE-2017-10087, CVE-2017-10089, CVE-2017-10096, CVE-2017-10101, CVE-2017-10102, CVE-2017-10105, CVE-2017-10107, CVE-2017-10108, CVE-2017-10109, CVE-2017-10110, CVE-2017-10115, CVE-2017-10116, CVE-2017-10135, CVE-2017-10193, CVE-2017-10198, CVE-2017-10243)</li>

Rpcbind does not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb.

References:

http://seclists.org/oss-sec/2017/q2/209 https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.This update upgrades Oracle Java SE 6 to version 6 Update 151.Security Fix(es): This update fixes multiple vulnerabilities in the Oracle Java Runtime Environment and the Oracle Java Software Development Kit. Further information about these flaws can be found on the Oracle Java SE Critical Patch Update Advisory page, listed in the References section. (CVE-2017-3509, CVE-2017-3526, CVE-2017-3533, CVE-2017-3539, CVE-2017-3544)

Oracle Java SE version 6 includes the Oracle Java Runtime Environment and the Oracle Java Software Development Kit.<br>This update upgrades Oracle Java SE 6 to version 6 Update 121.<br>Security Fix(es):<br><li> This update fixes multiple vulnerabilities in the Oracle Java Runtime Environment and the Oracle Java Software Development Kit. Further information about these flaws can be found on the Oracle Java SE Critical Patch Update Advisory page, listed in the References section. (CVE-2016-3458, CVE-2016-3500, CVE-2016-3503, CVE-2016-3508, CVE-2016-3550)</li>

Cisco Prime Infrastructure 1.2.0 through 2.2(2) and Cisco Evolved Programmable Network Manager (EPNM) 1.2 allow remote attackers to execute arbitrary code via crafted deserialized data in an HTTP POST request, aka Bug ID CSCuw03192.

Cisco TelePresence Server 4.1(2.29) through 4.2(4.17) on 7010; Mobility Services Engine (MSE) 8710; Multiparty Media 310, 320, and 820; and Virtual Machine (VM) devices allows remote attackers to cause a denial of service (memory consumption or device reload) via crafted HTTP requests that are not followed by an unspecified negotiation, aka Bug ID CSCuv47565.

The web API in Cisco Prime Infrastructure 1.2.0 through 2.2(2) and Cisco Evolved Programmable Network Manager (EPNM) 1.2 allows remote authenticated users to bypass intended RBAC restrictions and gain privileges via an HTTP request that is inconsistent with a pattern filter, aka Bug ID CSCuy10227.

Cross-site scripting (XSS) vulnerability in Cisco Unified Communications Domain Manager (CDM) 8.1(1) allows remote authenticated users to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCux80760.

The IKEv2 implementation in Cisco IOS 15.0 through 15.6 and IOS XE 3.3 through 3.17 allows remote attackers to cause a denial of service (device reload) via fragmented packets, aka Bug ID CSCux38417.

Cisco IOS 15.3 and 15.4, Cisco IOS XE 3.8 through 3.11, and Cisco Unified Communications Manager allow remote attackers to cause a denial of service (device reload) via malformed SIP messages, aka Bug ID CSCuj23293.

The Smart Install client implementation in Cisco IOS 12.2, 15.0, and 15.2 and IOS XE 3.2 through 3.7 allows remote attackers to cause a denial of service (device reload) via crafted image list parameters in a Smart Install packet, aka Bug ID CSCuv45410.

Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821.

Cisco NX-OS 4.0 through 6.1 on Nexus 1000V 3000, 4000, 5000, 6000, and 7000 devices and Unified Computing System (UCS) platforms allows remote attackers to cause a denial of service (TCP stack reload) by sending crafted TCP packets to a device that has a TIMEWAIT TCP session, aka Bug ID CSCub70579.

Cisco NX-OS 6.0(2)U6(1) through 6.0(2)U6(5) on Nexus 3000 devices and 6.0(2)A6(1) through 6.0(2)A6(5) and 6.0(2)A7(1) on Nexus 3500 devices has hardcoded credentials, which allows remote attackers to obtain root privileges via a (1) TELNET or (2) SSH session, aka Bug ID CSCuy25800.

Multiple cross-site scripting (XSS) vulnerabilities in Cisco Emergency Responder 11.5(0.99833.5) allow remote attackers to inject arbitrary web script or HTML via unspecified parameters, aka Bug ID CSCuy10766.

Cisco Unified Communications Manager (aka CallManager) 9.1(2.10000.28), 10.5(2.10000.5), 10.5(2.12901.1), and 11.0(1.10000.10); Unified Communications Manager IM & Presence Service 10.5(2); Unified Contact Center Express 11.0(1); and Unity Connection 10.5(2) store a cleartext encryption key, which allows local users to obtain sensitive information via unspecified vectors, aka Bug ID CSCuv85958.

Cisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3h) and 1.1 before 1.1(1j) and Nexus 9000 ACI Mode switches with software before 11.0(3h) and 11.1 before 11.1(1j) allow remote authenticated users to bypass intended RBAC restrictions via crafted REST requests, aka Bug ID CSCut12998.

Multiple cross-site scripting (XSS) vulnerabilities in Cisco Fog Director 1.0(0) allow remote attackers to inject arbitrary web script or HTML via a crafted parameter, aka Bug ID CSCux80466.

Cross-site scripting (XSS) vulnerability in Cisco Unity Connection 11.5(0.199) allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCuy09033.

SQL injection vulnerability in the web-based management interface on Cisco RV220W devices allows remote attackers to execute arbitrary SQL commands via a crafted header in an HTTP request, aka Bug ID CSCuv29574.