Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

CVEs (781)

CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS
CVE-2013-1620 4Canonical MozillaOracle+1 more 15Enterprise Linux Desktop Enterprise Linux EusEnterprise Linux Server+12 more Apr 29, 2026 Feb 8, 2013 N/A· v4 N/A· v3 4.3 MEDIUM· v2 The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows...Show more The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.Show less
CVE-2005-1650 1Woppoware 1Postmaster Apr 16, 2026 May 18, 2005 N/A· v4 N/A· v3 5.0 MEDIUM· v2 The web mail service in Woppoware PostMaster 4.2.2 (build 3.2.5) generates different error messages depending on whether a user exists or not, which allows remote attackers to determine valid usernames.
CVE-2005-0918 1Adobe 1Svg Viewer Apr 16, 2026 May 5, 2005 N/A· v4 N/A· v3 5.0 MEDIUM· v2 The NPSVG3.dll ActiveX control for Adobe SVG Viewer 3.02 and earlier, when running on Internet Explorer, allows remote attackers to determine the existence of arbitrary files by setting the src property to the target fil...Show more The NPSVG3.dll ActiveX control for Adobe SVG Viewer 3.02 and earlier, when running on Internet Explorer, allows remote attackers to determine the existence of arbitrary files by setting the src property to the target filename and using Javascript to determine if the web page immediately stops loading, which indicates whether the file exists or not.Show less
CVE-2004-2252 1Sophos 1Astaro Security Linux Apr 16, 2026 Dec 31, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 The firewall in Astaro Security Linux before 4.024 sends responses to SYN-FIN packets, which makes it easier for remote attackers to obtain information about the system and construct specialized attacks.
CVE-2004-2150 1Nettica 1Intellipeer Email Server Apr 16, 2026 Dec 31, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 Nettica Corporation INTELLIPEER Email Server 1.01 displays different error messages for valid and invalid account names, which allows remote attackers to determine valid account names.
CVE-2004-1428 1Argosoft 1Ftp Server Apr 16, 2026 Dec 31, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 ArGoSoft FTP before 1.4.2.1 generates an error message if the user name does not exist instead of prompting for a password, which allows remote attackers to determine valid usernames.
CVE-2004-0294 1Yabbforumsoftware 1Yet Another Bulletin Board Apr 16, 2026 Nov 23, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 YaBB 1 SP 1.3.1 displays different error messages when a user exists or not, which makes it easier for remote attackers to identify valid users and conduct a brute force password guessing attack.
CVE-2004-0243 1Ibm 1Aix Apr 16, 2026 Nov 23, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 AIX 4.3.3 through AIX 5.1, when direct remote login is disabled, displays a different message if the password is correct, which allows remote attackers to guess the password via brute force methods.
CVE-2004-0778 1Gnu 1Cvs Apr 16, 2026 Oct 20, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 CVS 1.11.x before 1.11.17, and 1.12.x before 1.12.9, allows remote attackers to determine the existence of arbitrary files and directories via the -X command for an alternate history file, which causes different error me...Show more CVS 1.11.x before 1.11.17, and 1.12.x before 1.12.9, allows remote attackers to determine the existence of arbitrary files and directories via the -X command for an alternate history file, which causes different error messages to be returned.Show less
CVE-2004-1602 1Proftpd 1Proftpd Apr 16, 2026 Oct 15, 2004 N/A· v4 N/A· v3 5.0 MEDIUM· v2 ProFTPD 1.2.x, including 1.2.8 and 1.2.10, responds in a different amount of time when a given username exists, which allows remote attackers to identify valid usernames by timing the server response.
CVE-2003-0637 1Novell 1Ichain Apr 16, 2026 Aug 27, 2003 N/A· v4 N/A· v3 5.0 MEDIUM· v2 Novell iChain 2.2 before Support Pack 1 uses a shorter timeout for a non-existent user than a valid user, which makes it easier for remote attackers to guess usernames and conduct brute force password guessing.
CVE-2003-0190 3Openbsd OpenpkgSiemens 4Openpkg OpensshScalance X204rna Ecc Firmware+1 more Apr 16, 2026 May 12, 2003 N/A· v4 N/A· v3 5.0 MEDIUM· v2 OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.
CVE-2003-0078 3Freebsd OpenbsdOpenssl 3Freebsd OpenbsdOpenssl Apr 16, 2026 Mar 3, 2003 N/A· v4 N/A· v3 5.0 MEDIUM· v2 ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that ma...Show more ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the "Vaudenay timing attack."Show less
CVE-2002-2094 1Joetesta 1Hellbent Apr 16, 2026 Dec 31, 2002 N/A· v4 N/A· v3 5.0 MEDIUM· v2 Joe Testa hellbent 01 allows remote attackers to determine the full path of the web root directory via a GET request with a relative path that includes the root's parent, which generates a 403 error message if the parent...Show more Joe Testa hellbent 01 allows remote attackers to determine the full path of the web root directory via a GET request with a relative path that includes the root's parent, which generates a 403 error message if the parent is incorrect, but a normal response if the parent is correct.Show less
CVE-2002-0515 1Phildev 1Ipfilter Apr 16, 2026 Aug 12, 2002 N/A· v4 N/A· v3 5.0 MEDIUM· v2 IPFilter 3.4.25 and earlier sets a different TTL when a port is being filtered than when it is not being filtered, which allows remote attackers to identify filtered ports by comparing TTLs.
CVE-2002-0514 1Openbsd 1Openbsd Apr 16, 2026 Aug 12, 2002 N/A· v4 N/A· v3 5.0 MEDIUM· v2 PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL.
CVE-2002-0208 1Network.associates 1Pgpfire Apr 16, 2026 May 16, 2002 N/A· v4 N/A· v3 5.0 MEDIUM· v2 PGP Security PGPfire 7.1 for Windows alters the system's TCP/IP stack and modifies packets in ICMP error messages in a way that allows remote attackers to determine that the system is running PGPfire.
CVE-2001-1528 1Amtote 1Homebet Apr 16, 2026 Dec 31, 2001 N/A· v4 N/A· v3 5.0 MEDIUM· v2 AmTote International homebet program returns different error messages when invalid account numbers and PIN codes are provided, which allows remote attackers to determine the existence of valid account numbers via a brute...Show more AmTote International homebet program returns different error messages when invalid account numbers and PIN codes are provided, which allows remote attackers to determine the existence of valid account numbers via a brute force attack.Show less
CVE-2001-1483 1Nrl.navy 1One Time Passwords In Everything Apr 16, 2026 Dec 31, 2001 N/A· v4 N/A· v3 5.0 MEDIUM· v2 One-Time Passwords In Everything (a.k.a OPIE) 2.32 and 2.4 allows remote attackers to determine the existence of user accounts by printing random passphrases if the user account does not exist and static passphrases if t...Show more One-Time Passwords In Everything (a.k.a OPIE) 2.32 and 2.4 allows remote attackers to determine the existence of user accounts by printing random passphrases if the user account does not exist and static passphrases if the user account does exist.Show less
CVE-2001-1387 1Netfilter 1Iptables Apr 16, 2026 Nov 5, 2001 N/A· v4 N/A· v3 2.1 LOW· v2 iptables-save in iptables before 1.2.4 records the "--reject-with icmp-host-prohibited" rule as "--reject-with tcp-reset," which causes iptables to generate different responses than specified by the administrator, possib...Show more iptables-save in iptables before 1.2.4 records the "--reject-with icmp-host-prohibited" rule as "--reject-with tcp-reset," which causes iptables to generate different responses than specified by the administrator, possibly leading to an information leak.Show less

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